Wye, Slip x Slip x Slip 3" x 3" x 2" (9875-338)

The 3" x 2" Schedule 40 White PVC Reducing Wye (9875-338, Slip x Slip x Slip) is a medium-bore thermoplastic reducing branch junction fitting manufactured to ASTM D2466 in Schedule 40 white PVC — a three-port fitting in which both run connections are 3" IPS slip socket ends and the branch connection is a 2" IPS slip socket end exiting at 45 degrees to the run axis, providing a single-body Schedule 40 PVC solution for connecting a 2" IPS socket PVC branch assembly to a 3" Schedule 40 PVC primary run at a branch junction location where the 3" primary run continues at full diameter through both straight-run ports downstream of the 2" branch connection and the 2" branch exits at 45 degrees to the run axis rather than at the 90-degree perpendicular angle of a standard reducing tee, without a saddle tap, without field fabrication, without transitioning out of Schedule 40 white PVC construction at the branch junction, and without the higher hydraulic minor loss at the branch junction that the 90-degree perpendicular branch geometry of the reducing tee produces at the same nominal size combination. The 9875-338 is the correct fitting wherever a 3" Schedule 40 PVC primary run must provide a 2" IPS socket PVC branch connection while maintaining the full 3" primary run diameter through both run sockets — where the 2" downstream branch assembly is permanently bonded socket PVC construction continuing in 2" IPS socket PVC pipe and fittings from the wye's branch socket, where the primary run must continue downstream of the 2" branch at full 3" diameter, where the branch connection must be a manufactured, rated, NSF-listed, ASTM D2466-compliant Schedule 40 white PVC wye body with a 45-degree branch socket whose 2" slip socket accepts standard 2" IPS Schedule 40 or Schedule 80 PVC pipe directly, and where the 45-degree branch angle provides a hydraulic, geometric, or gravity-flow advantage over the 90-degree perpendicular branch angle of the Spears 401 series reducing tee at the same 3"x2" size combination. The 9875-338 is the standard-lateral and appurtenance-scale reducing wye of the 3" Schedule 40 PVC socket fitting ecosystem — the most broadly applicable configuration in the Spears 9875 reducing wye series at the 3" run level and the highest-per-project-quantity reducing wye at the 3" run service level, serving the widest downstream application range of any branch size in the reducing wye series at the 3" run level by virtue of the 2" IPS branch socket's commercial universality across zone supply, drain, chemical injection, air release valve supply, instrument supply, and appurtenance branch assembly types in the irrigation, process piping, water distribution, and drainage markets.

The 9875-338's commercial identity is defined by the same two characteristics that define every Spears 9875 series reducing wye configuration documented in this catalog — the three-port branch junction role with a continuing 3" run, and the 45-degree branch angle — but with a hydraulic character at the 3" run service level that is meaningfully distinct from both the near-equal-branch 9875-339 above it and the 2" branch configurations documented at the larger 4" run service level. The 9875-338 does not reduce the run pipe size: both run sockets are 3" IPS, the primary run continues at full 3" diameter through both run ports, and no velocity increase occurs at the run ports. The 9875-338 does not transition the primary run inline: it is not a reducer coupling, and its run axis is not interrupted by a size change at the wye body. The 9875-338 does not adapt another fitting's socket: it is an independent three-port fitting body in the primary run, connected between upstream and downstream 3" IPS pipe sections with the 2" branch socket available as the 45-degree branch pipe connection at the junction point.

The 9875-338's hydraulic character at the 2" branch size's ~2.25x velocity increase — from the ~44% cross-sectional area ratio of the 2" branch relative to the 3" run — distinguishes it from the 9875-420 (4"x2" at 50% and ~4x velocity increase) despite both configurations sharing the same 2" IPS branch socket size. The 9875-338's 2" branch at 67% of the 3" run diameter carries a substantially larger proportional flow fraction from the 3" primary run than the 9875-420's 2" branch carries from the 4" primary run at the same operating velocity — the 9875-338's 2" branch is a zone supply lateral scale connection at the 3" run service level, while the 9875-420's 2" branch is a more purely appurtenance scale connection at the 4" run service level. This distinction governs the velocity verification requirement and the hydraulic character of the downstream 2" branch assembly's design service flow at each respective run service level. At a standard 3" primary run design velocity of 3 feet per second, the 2" downstream branch velocity at constant full-branch-flow equivalent through the branch socket would be approximately 6.75 feet per second — within standard design velocity limits for 2" IPS PVC pipe in zone supply service for most commercial design standards, but approaching the level where explicit confirmation against the downstream 2" secondary assembly's design velocity limit is warranted before specifying. At a standard 3" primary run design velocity of 4 feet per second, the corresponding branch velocity at full-run-velocity-equivalent branch flow would be approximately 9 feet per second — approaching or exceeding the upper boundary of standard design velocity limits for 2" IPS PVC pipe in most zone supply applications, requiring explicit engineering confirmation that the downstream 2" branch assembly's design service flow at peak demand produces a 2" branch velocity within the downstream system's design velocity limit. At a 3" primary run design velocity of 5 feet per second, the full-run-velocity-equivalent branch velocity would be approximately 11.25 feet per second — exceeding standard design velocity limits for 2" IPS PVC pipe in zone supply service, confirming that the 9875-338's 2" branch carries a confirmed design service flow fraction of the 3" primary run's total flow rather than the full run throughput at this run velocity level.

The governing pre-specification step at the 9875-338 is the same explicit branch velocity confirmation established across all branch junction fitting documentation in this catalog and across the complete Spears 9875 series wye pages: confirm that the downstream 2" branch assembly's confirmed design service flow — the peak demand of the downstream irrigation zone header, the confirmed pump suction or discharge branch flow, the confirmed drainage lateral collection flow, or the confirmed process equipment or appurtenance supply demand — produces a downstream 2" branch velocity within standard design limits for 2" IPS PVC pipe under the branch's peak service conditions. The three-tier velocity guidance for the 9875-338 at the 3" run service level reflects the ~2.25x velocity increase: at 3" run design velocities at or below approximately 2.7 feet per second, the full-run-velocity-equivalent 2" branch velocity remains at or below approximately 6 feet per second — within standard 2" IPS PVC design velocity limits in zone supply service; at 3" run design velocities between approximately 2.7 and 4 feet per second, the full-run-velocity-equivalent 2" branch velocity falls between approximately 6 and 9 feet per second — confirmation against the downstream 2" assembly's specific design velocity limit required before specifying; at 3" run design velocities above approximately 4 feet per second, the full-run-velocity-equivalent 2" branch velocity exceeds approximately 9 feet per second — explicit engineering confirmation required that the downstream 2" secondary assembly's design accepts this branch velocity or that the confirmed peak branch demand flow produces a branch velocity within the acceptable range when calculated at the actual branch design service flow rather than the full-run-velocity-equivalent flow. In most commercial irrigation zone supply, drain, chemical injection, and appurtenance branch service applications, the confirmed peak branch design service flow is substantially below the full-run-velocity-equivalent flow — the zone supply valve assembly, drain assembly, or appurtenance assembly draws its specific design service demand from the 3" primary run, not the entire primary run throughput — and the actual 2" branch velocity at the confirmed peak branch demand is substantially lower than the full-run-velocity-equivalent velocity used in the governing pre-specification calculation.

The 9875-338's position within the Spears 9875 series at the 3" run level completes the documented two-configuration standard-lateral and appurtenance-scale range below the 9875-339's near-equal-branch anchor at the 3" run service level. The 9875-339 (3"x2-1/2" at ~83%, ~1.44x) is the near-equal-branch configuration — the 2-1/2" downstream assembly serves large lateral supply sub-mains, large zone supply headers, and large-capacity appurtenance assemblies requiring near-equal supply capacity from the 3" primary run. The 9875-338 (3"x2" at ~67%, ~2.25x) is the standard-lateral and appurtenance-scale configuration — the 2" downstream assembly serves the full commercial range of zone supply valve connections, drain and blowoff assemblies, air release valve supply assemblies, chemical injection supply connections, instrument supply connections, sample connections, and standard appurtenance branch connections that constitute the majority of branch assembly types at the 3" primary run service level. The selection between the 9875-339 and the 9875-338 at any individual branch junction location on a 3" IPS primary run is governed entirely by the downstream branch assembly's confirmed required IPS pipe size — the 9875-339 is correct where the downstream assembly requires 2-1/2" IPS socket PVC supply capacity, and the 9875-338 is correct where the downstream assembly requires 2" IPS socket PVC supply capacity. In complete 3" Schedule 40 PVC primary run BOMs for large commercial irrigation systems, process piping networks, and municipal distribution lateral systems where both 2-1/2" and 2" IPS branch assemblies appear at different branch locations along the same primary run, both the 9875-339 and the 9875-338 will appear in the BOM at different locations — the 9875-339 at the less numerous large lateral supply and large zone supply header branch locations requiring 2-1/2" IPS capacity, and the 9875-338 at the much more numerous zone supply valve, drain, air release valve, chemical injection, and appurtenance branch locations that constitute the majority of branch positions along the 3" primary run route. The 9875-338 appears in substantially higher per-project quantities than the 9875-339 in most commercial irrigation, process piping, and water distribution 3" primary run BOMs — reflecting the 2" IPS branch size's position as the most commercially prevalent branch pipe size for zone supply valve assemblies, drain assemblies, air release valve supply assemblies, and standard appurtenance connections throughout the medium-bore irrigation, process piping, and water distribution markets at the 3" primary run service level.

The parallel between the 9875-338 at the 3" run service level and the 9875-420 at the 4" run service level — both the most broadly applicable and highest-per-project-quantity reducing wye at their respective run service levels, both with 2" IPS branch sockets, both serving the standard-lateral and appurtenance-scale role below the near-equal branch anchor at their respective run levels — is the primary navigational orientation the 9875-338 page must establish for buyers sourcing complete reducing wye BOMs across both the 3" and 4" run service levels. The critical distinction between the two configurations at the same 2" branch size is the velocity increase: the 9875-338's ~2.25x at the 3" run level versus the 9875-420's ~4x at the 4" run level. This velocity difference means the 9875-338's 2" branch carries a larger proportional flow fraction from the 3" primary run than the 9875-420's 2" branch carries from the 4" primary run at equivalent run velocities — a distinction that makes the 9875-338's downstream zone supply and lateral supply applications carry larger absolute flow volumes through the 2" branch socket at standard 3" run velocities than the 9875-420's equivalent appurtenance and zone supply applications carry at standard 4" run velocities. Buyers who have previously specified the 9875-420 on 4" IPS primary runs and are now specifying the 9875-338 on 3" IPS primary runs with the same 2" IPS downstream branch assemblies must apply the ~2.25x branch velocity factor rather than the ~4x factor when verifying downstream 2" branch velocity against the branch assembly's design velocity limit — the governing pre-specification velocity calculation differs between the two configurations despite the shared 2" branch socket size.

The most commercially important specification comparison at the 9875-338 is the wye versus reducing tee selection — the selection between the 9875-338 and the 3"x3"x2" Schedule 40 all-socket reducing tee in the Spears 401 series at the same 3"x2" run-and-branch size combination. Both the 9875-338 and the 3"x3"x2" reducing tee provide a 2" IPS socket PVC branch connection on a continuing 3" IPS primary run in Schedule 40 white PVC — the structural role, the run size, the branch size, and the material are all identical. The sole functional difference is the branch exit angle: the 9875-338 exits at 45 degrees, the reducing tee exits at 90 degrees perpendicular to the run. This angular difference produces every practical consequence that distinguishes the two fittings — the lower hydraulic minor loss at the 9875-338's 45-degree branch junction, the 45-degree directional requirement for the downstream 2" branch assembly's routing, the differently oriented thrust block at buried installations (at 45 degrees to the run versus perpendicular at the tee), and the 9875-338's smooth lateral flow contribution advantage in gravity drainage collection systems. At the 9875-338's ~67% branch-to-run ratio and ~2.25x velocity increase, the hydraulic minor loss advantage of the 45-degree wye over the 90-degree tee at the 2" branch junction on a 3" primary run is more consequential than at the 9875-420's 2" branch on a 4" primary run — because the 2" branch at 67% of the 3" run carries a larger absolute flow fraction from the primary run than the 2" branch at 50% of the 4" run, and the absolute minor loss at the branch junction is proportionally larger relative to the primary run's hydraulic head budget when the branch carries a larger flow fraction. This intermediate-scale amplification of the hydraulic minor loss advantage — greater than at the 9875-420's appurtenance scale but less extreme than at the 9875-339's near-equal scale — makes the 9875-338 more consistently preferred over the 3"x3"x2" reducing tee at hydraulically sensitive branch junction locations on 3" primary runs than the 9875-420 is preferred over its reducing tee counterpart at equivalent appurtenance-scale branch locations on 4" primary runs.

The selection between the 9875-338 and the 3"x3"x2" reducing tee is governed by the four criteria established across all wye-versus-tee comparisons in this catalog: the hydraulic minor loss budget for the primary run at the branch junction; the available routing space for the 45-degree branch departure direction versus the perpendicular departure; the gravity-flow or drainage service character; and the downstream branch assembly's preferred departure direction relative to the primary run. The 9875-338 is the correct specification where any of these four criteria governs the fitting selection at a specific 2" IPS branch location on a 3" IPS primary run; the 3"x3"x2" reducing tee is the correct specification where none of these criteria applies and the standard perpendicular branch geometry serves the application. At branch junction locations where the available space in the run-axis direction cannot accommodate the 9875-338's 45-degree branch footprint — at branch locations where the available space between the wye body and an adjacent structural element, trench obstruction, or piping boundary is insufficient for the 45-degree branch departure geometry — the 3"x3"x2" reducing tee's perpendicular branch may be the only geometrically viable configuration regardless of the hydraulic preference for the wye. The 45-degree branch departure direction is committed permanently at the wye body at cement application and cannot be field-modified; buyers must confirm the downstream branch assembly's routing direction and the available routing space in the run-axis direction from the piping layout drawing before specifying the 9875-338 over the 3"x3"x2" reducing tee.

The second critical comparison at the 9875-338 is the branch size selection within the Spears 9875 series at the 3" run — between the 9875-338 (2" branch at ~67%) and the 9875-339 (2-1/2" branch at ~83%) as the two documented reducing wye configurations at the 3" run level. This selection is governed by the downstream branch assembly's confirmed required IPS supply pipe size, determined from the downstream assembly's hydraulic demand analysis, zone supply design, drainage lateral design, or appurtenance manufacturer connection specification. Where the downstream assembly requires 2" IPS socket PVC supply capacity, the 9875-338 is correct; where the downstream assembly requires 2-1/2" IPS socket PVC supply capacity, the 9875-339 is correct. The velocity increase difference — ~2.25x at the 9875-338 versus ~1.44x at the 9875-339 — confirms that the two configurations are not interchangeable at the same primary run design velocity: at a 3" run velocity of 4 feet per second, a hypothetical full-run-velocity-equivalent flow through the 9875-338's 2" branch produces approximately 9 feet per second, while the same flow through the 9875-339's 2-1/2" branch produces approximately 5.8 feet per second — a meaningful velocity difference that must be reflected in the confirmed downstream branch assembly design before the branch size selection is finalized.

The third critical comparison is the wye versus FPT branch distinction — between the 9875-338's 2" slip branch socket and any wye or tee configuration with a 2" FPT branch port at the same 3"x2" run-and-branch size combination. The 9875-338's 2" slip branch socket is the correct specification wherever the downstream 2" branch assembly continues in permanently bonded socket PVC pipe and fitting construction. A wye or tee configuration with a 2" FPT branch port is correct wherever the first downstream component at the branch is an inherently 2" male NPT threaded component. At the 2" branch size in the irrigation, process piping, and water distribution markets, both socket PVC downstream assemblies and male NPT threaded downstream components are commercially active — 2" IPS male NPT threaded ball valves, gate valves, solenoid valve bodies, and appurtenance assemblies are widely available in the commercial irrigation and distribution appurtenance market at the same 2" IPS branch size. The downstream branch component's connection interface type must be confirmed from the component manufacturer's specification before purchasing any branch junction fitting at a 3"x2" branch location. The 9875-338's slip branch socket is the correct specification where socket PVC pipe continuation from the branch is confirmed; the FPT branch wye or tee is the correct specification where a 2" male NPT threaded component is confirmed as the first downstream connection.

The 9875-338 is additionally distinguished from the 3"x2" Schedule 80 PVC inline reducer coupling in the Spears 829 series and the 3"x2" Schedule 80 PVC reducing bushing in the Spears 837 series by its three-port branch junction structural role with a continuing 3" run. The 3"x2" inline reducer coupling transitions the entire 3" primary run flow inline from the 3" large-end socket to the 2" small-end socket with no continuing 3" run downstream of the transition — the entire primary run flow passes through the 2" small-end socket at a ~2.25x velocity increase, and the 3" primary run does not continue to serve downstream distribution zones, additional branch connections, or downstream terminal assemblies beyond the reducer coupling at the 3" diameter. The 9875-338 maintains the 3" primary run through both run ports and provides a 2" IPS socket PVC 45-degree branch connection at the junction — the 3" primary run continues at full diameter downstream of the branch junction. The structural role distinction between the 9875-338 (branch junction with continuing 3" run) and the 3"x2" inline reducer coupling (terminal inline size transition with no continuing 3" run) is the most commercially critical fitting type decision at every 3" primary run location requiring a 2" IPS socket PVC connection, governed by the single most important structural question: does the 3" primary run continue downstream of the 2" connection point at full 3" primary diameter? Where yes, the 9875-338 is correct; where no, the 3"x2" inline reducer coupling serves the terminal inline transition role.

The 9875-338's gravity drainage application role at the 3" collection main and 2" lateral scale is the same standard branch junction function the wye fitting type serves across all drainage collection lateral entry applications in the documented Spears 9875 series — the 45-degree branch angle's smooth lateral flow contribution geometry is preferred over the 90-degree tee at every drainage lateral entry junction regardless of branch size, and the 9875-338 carries this preference at the intermediate 2" branch scale where the lateral contributes a moderately larger flow fraction to the 3" collection main than a smaller branch would. In subsurface agricultural drainage systems, stormwater collection systems, site drainage secondary collection networks, and facility drainage collection systems at the 3" collection main and 2" lateral scale, the 9875-338's 45-degree branch entry orients the 2" lateral's drainage flow contribution in a direction more aligned with the 3" collection main's downstream gravity flow direction — reducing turbulence, flow reversal, and debris accumulation risk at the lateral entry junction compared to the 90-degree perpendicular entry of the 3"x3"x2" reducing tee. At the 9875-338's ~67% branch-to-run ratio, the 2" lateral contributes a moderately larger flow fraction to the collection main than the smaller-proportion appurtenance-scale branches, and the turbulence and flow reversal risk at the perpendicular tee entry is proportionally greater than at the more asymmetric smaller-branch configurations — making the 45-degree wye's smooth flow contribution advantage more hydraulically consequential at the 9875-338's intermediate branch scale than at pure appurtenance-scale branch entries. The 9875-338 branch socket orientation in gravity drainage installations requires the same three-dimensional confirmation established across all wye fitting pages in this catalog — the branch socket must be oriented to receive gravity flow from the elevated 2" lateral (facing upslope, upstream, and at the confirmed lateral invert elevation above the collection main's flow line) from the drainage grade plan, invert elevation calculations, and collection main alignment drawings before cement is applied at any socket.

In pressurized commercial irrigation systems — the highest-volume market category for the 9875-338 in the Maxx-Supply commercial irrigation contractor market — the 9875-338 is the standard zone supply branch wye on 3" IPS primary supply laterals serving 2" IPS zone supply valve assemblies, the most commercially prevalent zone supply fitting configuration in the medium-bore commercial irrigation market. At large commercial and agricultural irrigation systems with 3" IPS primary supply laterals serving multiple 2" IPS zone supply valve assemblies along the lateral route, the 9875-338 is specified at zone supply branch locations where the lateral's hydraulic analysis identifies the branch junction's minor loss contribution as pressure-head-sensitive, where the zone supply valve assembly's routing in the lateral's run-axis direction accommodates the 45-degree branch departure geometry, or where the irrigation system designer's standard specification requires the wye at all zone supply branch junctions as a hydraulic efficiency discipline applied uniformly across the lateral's full run. In drip irrigation systems with multiple 2" IPS sub-lateral supply branch connections along extended 3" IPS supply laterals, in chemical injection supply systems with 2" IPS injection station supply connections at multiple lateral locations, and in fertilizer injection systems with 2" IPS injection supply branches at field block supply points, the 9875-338 provides the smooth 45-degree branch supply entry geometry that reduces the branch junction's hydraulic minor loss contribution to the lateral's cumulative head loss budget at each injection and supply branch location. The ~2.25x velocity increase at the 9875-338's 2" branch — compared to the ~4x of the 9875-420's 2" branch at the 4" run level — confirms that the 9875-338's 2" branch at the 3" run level is drawing a proportionally larger zone supply demand from the primary lateral than the 9875-420's 2" branch draws from the 4" run, and that the hydraulic minor loss at each 9875-338 branch junction is more consequential in the 3" lateral's total head loss budget than the equivalent 9875-420 branch junction is in the 4" lateral's budget — amplifying the hydraulic case for specifying the 9875-338 over the 3"x3"x2" reducing tee at pressure-head-sensitive zone supply branch locations on 3" primary laterals relative to the corresponding case at 4" primary laterals.

The 9875-338 is specified alongside the 9875-339 in the same commercial irrigation 3" primary lateral BOM at different branch locations — the 9875-339 at the less numerous large lateral supply, large sub-main supply, and large zone supply header branch locations requiring 2-1/2" IPS supply capacity, and the 9875-338 at the much more numerous 2" IPS zone valve, drain, air release valve, and chemical injection branch locations — with the 9875-338 appearing in substantially higher per-project quantities than the 9875-339 in most commercial irrigation 3" primary run BOMs, reflecting the 2" IPS zone supply valve assembly's predominance as the standard zone appurtenance size and the 2" IPS drain, air release valve, and chemical injection assembly's prevalence at appurtenance branch locations throughout the 3" IPS primary lateral's full run.

The assembly requirements at the 9875-338 follow the three-socket assembly discipline established across all wye fitting pages in this catalog — two equal 3" IPS run sockets and one 2" IPS branch socket at 45 degrees to the run axis — with the size differential between the two 3" run sockets and the single 2" branch socket producing an assembly where the branch socket is meaningfully smaller than the run sockets but not as asymmetric as the 9875-420's 2" branch relative to its 4" run sockets. Both 3" run socket connections require heavy-body solvent cement rated for 3" IPS Schedule 40 or Schedule 80 PVC pipe, applied with complete circumferential coverage at both 3" bonding surfaces within the available working time. The 2" branch socket requires heavy-body solvent cement rated for 2" IPS Schedule 40 or Schedule 80 PVC pipe — a smaller bonding surface than either 3" run socket, with proportionally shorter working time and lower cement volume requirements, but requiring the same complete circumferential coverage discipline and full insertion depth that both run sockets require. The assembly sequence must be planned with all three pipe ends positioned and accessible before cement application begins at any socket. The 45-degree branch socket's departure direction — in both the departure plane and the rotational orientation about the run axis — must be confirmed by dry-fit and reference-marked before cement application, as established across all wye fitting pages in this catalog, because the 45-degree branch direction is fixed permanently at cement application and angular error in either plane produces permanent downstream 2" branch assembly routing misalignment. The two-plane orientation confirmation applies at the 9875-338 with the same force as at every other wye configuration in this catalog and must not be abbreviated at the 2" branch scale — the smaller branch socket size does not reduce the consequence of angular orientation error at cement application, and the reference-mark dry-fit discipline is mandatory before cement at the 9875-338 regardless of the branch socket's relative size. In gravity drainage installations, the branch socket's three-dimensional orientation — departure plane, rotational orientation about the run axis, and branch invert elevation above the collection main's flow line — must be confirmed from the drainage system's grade plan before cement is applied at any socket. Apply complete circumferential heavy-body cement coverage at all three socket connections within the available working time for each respective socket size, comply fully with cure time requirements before any system pressurization or gravity-flow service, and deburr and bevel all three pipe ends before cementing to ensure consistent insertion depths and complete bond lines at all three socket connections.

The branch thrust force at buried 9875-338 installations follows the framework established across both documented wye fitting pages in this catalog: the resultant branch thrust force acts at 45 degrees to the run axis along the branch pipe axis, directed outward from the wye body in the 2" branch departure direction, with a magnitude equal to P × A_branch at the 2" IPS pipe's cross-sectional area. At the 2" IPS branch size on a 3" primary run at the 9875-338's intermediate branch scale, the absolute thrust force magnitude — P × A_branch at the 2" IPS cross-sectional area — is the same as at the 9875-420's 2" branch at the 4" run level at the same operating pressure, reflecting the shared 2" IPS branch socket and its cross-sectional area regardless of the primary run size. The thrust block bearing surface must be oriented perpendicular to the 45-degree branch pipe axis — at 45 degrees to the trench run-axis orientation — to resist both the perpendicular-to-run and along-run thrust force components simultaneously, and undisturbed soil must be confirmed available in the 45-degree bearing direction at each buried 9875-338 installation. The thrust block bearing area is calculated from P × A_branch at the 2" IPS cross-sectional area and the full anticipated system operating pressure including surge transient at each individual buried installation location. No thrust restraint is required at either 3" run socket. Thrust block construction drawings prepared by the primary system engineer are required at every buried 9875-338 installation in public water distribution systems and primary main installations regulated by the authority having jurisdiction.

The schedule selection at the 9875-338 follows the engineering framework established across all Schedule 40 specialty fitting documentation in this catalog. Schedule 40 is the correct specification where the system's design operating pressure, surge allowance, and engineering safety margin requirements fall within the Schedule 40 pressure ceiling at the 3" fitting size, where the system specification does not mandate Schedule 80 gray PVC throughout, and where the design engineer has confirmed that Schedule 40 wall thickness satisfies all engineering requirements at the 3" primary run branch location. In irrigation zone supply, drain, chemical injection, air release valve supply, and standard appurtenance branch junction applications at the 3"x2" wye size combination, Schedule 40 is the predominant correct specification for systems operating within the Schedule 40 pressure ceiling. Where the system requires Schedule 80 wall thickness, gray material class identification, higher pressure ceiling, or system-wide Schedule 80 specification at the 3" wye fitting location, the Schedule 80 counterpart at the 3"x3"x2" wye configuration is the correct specification.

Schedule 40 white PVC construction provides the chemical resistance, NSF certification, and structural capability appropriate for medium-bore irrigation zone supply lateral, drainage collection, pump manifold, and process piping branch junction wye service within the Schedule 40 pressure and wall thickness envelope. PVC Type 1 Grade 1 construction with cell classification 12454 per ASTM D1784 delivers broad chemical resistance across irrigation water, drainage water, process water service, water treatment chemicals, and the full range of non-solvent process fluids appropriate for Schedule 40 PVC service at all three socket connections. The 2" branch socket is compatible with both Schedule 40 and Schedule 80 2" IPS PVC pipe — the schedule of the downstream 2" branch pipe is selected based on the downstream assembly's own design requirements and system-wide material specification standard. NSF 61 certification lists this fitting for potable water contact, and NSF 14 covers compliance with applicable plastics piping material standards. ASTM D2466 governs Schedule 40 PVC socket fittings and defines the manufacturing, dimensional, and pressure performance requirements the 9875-338 is produced to. Verify manufacturer pressure rating documentation before final system specification — at the 3"x3"x2" wye configuration, the governing pressure rating must be confirmed against the manufacturer's published pressure-temperature rating table for SKU 9875-338 before installation in systems at or near the fitting's rated pressure ceiling.

Key Features:

• Schedule 40 white PVC reducing wye — 3" run (slip socket) x 3" run (slip socket) x 2" branch (slip socket, 45-degree exit); Spears 9875 series Schedule 40 PVC socket wyes
• 45-degree branch angle — distinguishes the 9875-338 from the 3"x3"x2" Schedule 40 reducing tee (Spears 401 series) at the same size combination; lower hydraulic minor loss coefficient at the branch junction; smoother flow division geometry; more consequential minor loss advantage than at the 9875-420's 2" branch at the 4" run level — the 2" branch at ~67% of the 3" run carries a larger proportional flow fraction than at the 4" run level, amplifying the absolute minor loss at the branch junction; preferred over the reducing tee in gravity drainage collection, pump suction NPSH-sensitive manifold entries, hydraulically sensitive zone supply branch junctions on 3" primary laterals, and 45-degree routing geometry applications
• 2" branch socket at ~67% of 3" run diameter — ~44% cross-sectional area ratio; ~2.25x velocity increase at constant full-branch-flow passage; standard-lateral and appurtenance-scale reducing wye at the 3" run level; intermediate position between the near-equal-branch 9875-339 (83%, ~1.44x) and the more asymmetric appurtenance scale of the 9875-420 (50%, ~4x) at the 4" run level; 2" branch design service flow confirmed within 2" IPS PVC velocity limits at peak branch service before specifying
• Velocity verification — three-tier guidance: at 3" run velocity ≤~2.7 ft/s, 2" branch velocity ≤~6 ft/s — within standard 2" IPS PVC limits; at 3" run velocity 2.7–4 ft/s, 2" branch velocity ~6–9 ft/s — confirm against downstream 2" design velocity limit; at 3" run velocity >4 ft/s, 2" branch velocity >~9 ft/s — explicit engineering confirmation required; actual branch demand flow is confirmed design service fraction of primary run — full-run-velocity-equivalent calculation is governing pre-specification check, not an indication that full run throughput passes through the branch
• Velocity increase distinction from 9875-420 at same 2" branch size — 9875-338 at 3" run: ~2.25x; 9875-420 at 4" run: ~4x; buyers specifying 9875-338 after experience with 9875-420 must apply ~2.25x branch velocity factor — not the ~4x factor — when verifying downstream 2" branch velocity; 2" branch at 3" run service level is zone supply lateral scale, not pure appurtenance scale
• Most broadly applicable reducing wye at the 3" run level — 2" IPS branch socket's downstream application range spans zone supply valve assemblies, drain and blowoff assemblies, air release valve supply assemblies, chemical injection supply connections, instrument supply connections, sample connections, and appurtenance branch connections; widest commercial downstream application range of any branch size in the Spears 9875 reducing wye series at the 3" run level; appears in higher per-project quantities than the 9875-339 in most commercial irrigation, process piping, and water distribution 3" primary run BOMs; parallels the 9875-420's most-broadly-applicable position at the 4" run level
• 3" primary run continues at full diameter through both run sockets — the 9875-338 is a branch junction fitting with two equal 3" run ports; NOT an inline reducer coupling; primary run continues at full 3" diameter downstream of the 2" branch; distinct from 3"x2" inline reducer coupling (Spears 829 series) whose entire run transitions inline to 2" with no continuing 3" run
• Two-configuration documented Spears 9875 reducing wye series at the 3" run level — 9875-339 (3"x2-1/2", ~83%, ~1.44x, near-equal branch, large lateral supply and large zone supply header applications) and 9875-338 (3"x2", ~67%, ~2.25x, standard-lateral and appurtenance scale, zone supply valve, drain, chemical injection, and appurtenance applications); selection between the two governed by downstream assembly's confirmed required IPS pipe size from hydraulic demand analysis or manufacturer connection specification
• First critical comparison — wye versus reducing tee: 9875-338 (45-degree branch, intermediate-scale minor loss advantage more consequential than at 4" run appurtenance scale) where minor loss reduction, gravity drainage lateral contribution geometry, pump suction NPSH, or 45-degree routing governs; 3"x3"x2" Schedule 40 reducing tee (Spears 401 series, 90-degree branch) where perpendicular routing, run-axis space constraints, or standard specification governs; 45-degree branch departure confirmed from piping layout before purchase — permanently committed at cement application
• Gravity drainage advantage — 2" lateral at ~67% of 3" collection main contributes moderately larger proportional flow fraction than smaller appurtenance-scale branches; turbulence and flow reversal risk at perpendicular tee entry proportionally greater at this intermediate branch scale; 45-degree wye entry smooth flow contribution more hydraulically consequential than at pure appurtenance-scale branch entries; standard specification at 2" IPS lateral entry points on 3" gravity drainage collection mains where smooth 45-degree lateral contribution geometry is valued
• Pump suction manifold advantage — 2" IPS branch at ~67% of 3" primary suction header drawing a moderately larger supply flow fraction produces proportionally greater absolute suction-side minor loss at branch entry than pure appurtenance-scale branches; 45-degree entry reduces this suction-side minor loss meaningfully at zone supply scale branch entries; specified at suction-side branch entries where NPSH margin analysis identifies branch junction minor loss as hydraulically material
• Branch socket orientation committed at cement application — two-plane confirmation required: departure plane and rotational orientation about run axis; reference-mark dry-fit mandatory before cement at any socket; smaller 2" branch socket size does not reduce consequence of angular error — two-plane discipline applies with same force as at larger branch sockets; three-dimensional confirmation in gravity drainage installations from grade plan before cement
• Branch thrust force at buried installations — resultant force: P × A_branch at 2" IPS cross-sectional area directed at 45 degrees to run axis; same bearing area requirement as 9875-420's 2" branch at same operating pressure (shared 2" IPS cross-sectional area); bearing surface perpendicular to 45-degree branch axis at 45 degrees to trench run-axis orientation; undisturbed soil confirmed in 45-degree bearing direction; no thrust restraint at either 3" run socket
• Second critical comparison — slip branch socket versus FPT: 9875-338 where downstream 2" assembly continues in socket PVC construction; FPT wye or tee where downstream 2" component is inherently 2" male NPT threaded; at 2" branch size both socket PVC and male NPT downstream components are commercially active — confirm from downstream component manufacturer specification before purchasing
• Three socket connections require planned assembly sequence — both 3" run sockets and 2" branch socket; all pipe ends positioned and branch socket orientation dry-fit confirmed before cement at any socket; both 3" run sockets require heavy-body cement; 2" branch socket requires heavy-body cement with complete circumferential coverage despite smaller bonding surface; full cure time compliance before pressurization or gravity-flow service
• 2" branch socket accepts Schedule 40 and Schedule 80 2" IPS PVC pipe
• Schedule 40 vs. Schedule 80: Schedule 40 correct where system pressure, surge, and safety margin fall within Schedule 40 pressure ceiling at 3" wye fitting size; predominant correct specification in irrigation zone supply lateral, gravity drainage, and moderate-pressure process piping applications
• Manufactured to ASTM D2466 — governing standard for Schedule 40 PVC socket fittings
• NSF 61 certified for potable water contact; NSF 14 listed
• Both run sockets compatible with Schedule 40 and Schedule 80 IPS 3" pipe; branch socket compatible with Schedule 40 and Schedule 80 IPS 2" pipe
• White color — Schedule 40 material class identification at the branch junction location
• Cell classification PVC 12454 per ASTM D1784
• Heavy-body solvent cement required at all three socket connections; full cure time compliance mandatory before pressurization or gravity-flow service
• Pressure rating: verify against manufacturer pressure-temperature table for SKU 9875-338

Specifications:

Industries & Applications:

• Commercial & Agricultural Irrigation — 45-Degree Zone Supply Valve Branch Connections, Drain and Blowoff Connections, Air Release Valve Supply Branches, Chemical Injection Supply Branches, and Instrument Supply Connections on 3" Schedule 40 PVC Primary Laterals and Distribution Mains — The 3" x 2" Schedule 40 PVC reducing wye is the standard zone supply branch wye at the 3" run service level and the most commercially prevalent reducing wye configuration in the Spears 9875 series at the 3" run level in the Maxx-Supply commercial irrigation contractor market — specified at 2" IPS socket PVC branch assembly locations on 3" Schedule 40 PVC irrigation primary laterals and distribution mains where the 45-degree branch angle's lower minor loss coefficient and zone supply lateral scale hydraulic advantage are preferred over the 90-degree reducing tee at zone supply, drain, chemical injection, air release valve supply, and instrument supply branch locations; zone supply valve branch connections where the 3" IPS primary lateral provides 2" IPS socket PVC supply to zone supply valve assemblies — ball valve, gate valve, and solenoid valve assemblies with 2" IPS socket PVC inlet connections — at lateral branch junction locations where the ~2.25x velocity increase at the 9875-338's 2" branch reflects a zone supply lateral scale flow fraction that makes the 45-degree wye's minor loss reduction more hydraulically consequential in the 3" lateral's head budget than the equivalent 2" branch connection at a 4" run service level; drip irrigation sub-main supply valve branch connections where the 3" IPS primary lateral provides 2" IPS socket PVC supply to drip sub-main supply valve assemblies and zone header supply connections, with the 9875-338 specified at zone supply valve branch locations where the lateral's pressure head budget is sensitive to branch junction minor loss and the ~2.25x velocity increase at the 2" branch confirms a meaningful zone supply demand fraction drawing from the 3" lateral; pressure regulation and filter station 2" IPS inlet supply branches where the 3" IPS lateral provides 2" IPS socket PVC supply to zone-level pressure regulators, disc filter stations, and screen filter stations; drain and blowoff assembly branch connections where the 3" IPS primary lateral requires 2" IPS socket PVC drain valve and blowoff valve connections at low-point and end-of-lateral drain locations, with the 9875-338 providing 45-degree drain branch connections at drain locations where the run-axis routing space accommodates the 45-degree departure geometry; air release valve supply assembly branch connections where the 3" IPS primary lateral requires 2" IPS socket PVC supply to combination air release and vacuum breaker valve assemblies and automatic air release valve assemblies at high-point air release locations; chemical injection supply branch connections where the 3" IPS irrigation main provides 2" IPS socket PVC supply to fertilizer injection station assemblies, soil amendment injection supply connections, pH adjustment chemical injection connections, and water treatment chemical injection supply connections at primary chemical injection station locations; flow meter bypass and sample connection branches where the 3" IPS primary lateral requires 2" IPS socket PVC supply connections to flow metering station bypass assemblies and process sample connections; irrigation pump station primary discharge lateral 2" IPS branch connections where the 3" IPS primary discharge lateral provides 2" IPS socket PVC supply branches to zone supply valve assemblies, drain assemblies, and chemical injection connections; the 9875-338 appears in substantially higher per-project quantities than the 9875-339 in commercial irrigation 3" primary lateral BOMs — the 9875-339 appearing at the less numerous large lateral supply and large zone supply header branch locations requiring 2-1/2" IPS capacity, and the 9875-338 at the much more numerous 2" IPS zone valve, drain, air release valve, and chemical injection appurtenance branch locations that constitute the majority of branch positions along the 3" primary lateral route; downstream 2" branch design service flow confirmed within 2" IPS PVC velocity limits at peak demand before specifying; 45-degree branch socket departure direction confirmed from piping layout before cement; NSF 61 listing confirms potable water fitness at every irrigation lateral 2" branch connection
• Gravity Drainage & Stormwater Collection — 45-Degree 2" IPS Lateral Branch Connections on 3" Schedule 40 PVC Gravity Drainage Collection Mains, Agricultural Subsurface Drainage Collection Mains, and Stormwater Secondary Collection Mains — Specified as the standard 2" lateral branch junction fitting in 3" Schedule 40 PVC gravity drainage collection systems where the 2" lateral contributes a moderately larger proportional flow fraction to the 3" collection main than pure appurtenance-scale branches — the intermediate branch scale that makes the 45-degree wye's smooth flow contribution geometry more consequential than at smaller-branch configurations while the universal application range of the 2" IPS lateral makes this the highest-volume gravity drainage wye fitting at the 3" collection main service level; subsurface agricultural drainage collection main 2" lateral branch connections where the 3" IPS collection main receives 2" IPS lateral drainage contributions from individual field drainage laterals, perforated pipe drainage collector connections, and subsurface drainage tube outlets through the 9875-338's 45-degree branch socket, with the intermediate ~67% branch contribution scale making the perpendicular tee's turbulence and flow reversal risk meaningfully greater than at smaller appurtenance-scale branch configurations — and the 9875-338's 45-degree entry geometry providing correspondingly greater smooth-flow-contribution advantage; site drainage secondary collection main 2" lateral connections where the 3" IPS secondary collection main receives 2" IPS lateral contributions from area drain outlets, swale drainage discharge connections, and site drainage inlet connections distributed along the secondary collection main's route; landscape and turf drainage collection main 2" lateral connections where the 3" IPS drainage collection trunk serves as the primary collection main for 2" IPS drainage laterals in golf course drainage collection networks, sports field primary drainage systems, and large landscape drainage collection networks — the 9875-338 providing the standard 45-degree lateral entry geometry at each 2" IPS collection junction along the 3" collection trunk; stormwater secondary collection main 2" lateral connections where the 3" IPS stormwater collection main receives 2" IPS lateral contributions from catch basin outlet connections, area drain assemblies, roof drain discharge connections, and stormwater inlet assemblies at distributed lateral entry points; commercial site drainage collection main 2" lateral connections where the 3" IPS site drainage collection main receives 2" IPS lateral contributions from parking area drainage outlets, building perimeter drainage assemblies, and paved surface drainage collection connections; facility drainage collection main 2" lateral connections where the 3" IPS facility collection main receives 2" IPS lateral contributions from equipment drainage connections, floor drain collection assemblies, and process area drainage outlets; branch socket orientation in gravity drainage installations confirmed in three dimensions — departure plane, rotational orientation about run axis, and confirmed invert elevation of 2" lateral branch socket above collection main flow line — from drainage grade plan, invert elevation calculations, and collection main alignment drawings before cement at any socket; NSF 61 listing confirms potable water fitness at drainage installations where NSF-listed materials are required
• Pump Station & Pump System Manifolds — 45-Degree 2" IPS Branch Supply Connections at Pump Suction Manifolds, Pump Discharge Headers, Manifold Drain Connections, and Air Release Valve Supply Connections on 3" Schedule 40 PVC Pump Assembly Headers — Used at 2" IPS socket PVC branch supply locations on 3" Schedule 40 PVC pump suction and discharge manifold assemblies where the 45-degree branch entry's suction-side minor loss advantage is applied at the zone supply lateral scale — irrigation pump station 3" IPS primary suction manifold 2" IPS branch supply entries where the 9875-338 provides 45-degree branch entry geometry at 2" IPS socket PVC supply connections to the pump station's primary suction manifold, with the ~2.25x velocity increase at the 2" branch on the 3" suction header reflecting a proportionally larger supply flow fraction than a 2" branch on a 4" suction header — making the 45-degree entry's suction-side minor loss reduction at the 9875-338 more consequential to preserving available NPSH at the pump impeller inlet than at the equivalent 4" suction manifold branch entry; pump station 3" IPS primary discharge header 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to zone supply assemblies and appurtenance connections at pump station discharge header branch locations; pump station 3" IPS primary header 2" IPS drain and blowoff branch connections at header drain and blowoff locations, with the 45-degree drain branch departure accommodating drain assembly routing in the pump station header bay layout; pump station 3" IPS primary header 2" IPS air release valve supply branch connections at header high-point air release locations; booster pump station 3" IPS primary manifold 2" IPS branch connections at discharge supply assemblies and secondary pump suction supply entries; process pump suction manifold 3" IPS header 2" IPS supply branch entries where the 9875-338 provides smooth 45-degree branch supply entries at process pump suction manifold supply connections; at pump stations where primary headers operate at full system pressure including shut-off head and surge, the pump station operating pressure must be confirmed within the Schedule 40 pressure ceiling at the 3" wye fitting before Schedule 40 material class is finalized at pump station piping locations
• Water Treatment Plant — 45-Degree 2" IPS Branch Connections at Distribution Header Zone Supply Branches, Chemical Dosing Supply Connections, Instrument Supply Branches, Drain Assembly Connections, and Air Release Valve Supply Connections on 3" Schedule 40 PVC Distribution Headers — Installed at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC primary distribution headers in municipal and industrial water treatment plants where the 45-degree branch angle's lower minor loss and smooth flow division are preferred — filter gallery 3" IPS distribution header 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC zone supply branches to individual filter gallery process unit supply assemblies, zone supply valve connections, and appurtenance supply connections; plant service water distribution header 2" IPS branch supply connections where the 9875-338 provides 2" IPS socket PVC supply to plant service water zone supply assemblies and facility service connections; primary distribution header 2" IPS chemical dosing supply branch connections where the 9875-338 provides 2" IPS socket PVC supply connections to chemical dosing injection assemblies at primary chemical injection station locations; primary distribution header 2" IPS instrument supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to pressure gauge assemblies, flow transmitter supply connections, sample valve supply assemblies, and process monitoring instrument connections; primary distribution header 2" IPS drain and blowoff branch connections at header drain locations; primary distribution header 2" IPS air release valve supply branch connections at header high-point locations; NSF 61 listing confirms potable water fitness at every water treatment plant distribution header branch connection
• Municipal Water Distribution — 45-Degree 2" IPS Branch Connections at Secondary Distribution Header Zone Supply Branches, Service Meter Supply Branches, Drain Assembly Connections, Air Release Valve Supply Connections, and Sample Connection Branches on 3" Schedule 40 PVC Secondary Distribution Mains — Specified at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC secondary distribution mains in municipal water distribution systems where the 45-degree wye branch angle is preferred — secondary distribution main 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to service zone supply assemblies, commercial service line connections, and service zone valve assemblies at distribution main branch locations where the ~2.25x velocity increase at the 2" branch on the 3" secondary main reflects a meaningful zone supply demand fraction making the 45-degree minor loss reduction more hydraulically consequential than at equivalent 4" secondary main branch connections; secondary distribution main 2" IPS drain valve branch connections at low-point drain locations and end-of-main drain assembly connections; secondary distribution main 2" IPS air release and vacuum breaker valve supply branch connections at high-point locations; secondary distribution main 2" IPS sample connection branches at distribution system monitoring and control locations; secondary distribution main 2" IPS sub-lateral supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to downstream sub-lateral distribution headers; NSF 61 listing confirms potable water fitness at every municipal distribution secondary main 2" socket branch connection
• Industrial Process Piping — 45-Degree 2" IPS Branch Connections at Primary Process Header Zone Supply Branches, Equipment Supply Connections, Drain Assembly Branches, Chemical Injection Supply Connections, and Instrument Supply Branches on 3" Schedule 40 PVC Process Headers — Used at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC primary process headers in manufacturing plants, chemical processing facilities, and industrial environments — process water supply header 2" IPS zone supply and equipment supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to individual process equipment supply connections, zone supply valve assemblies, and major process supply branch connections; cooling water distribution header 2" IPS equipment supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to individual cooling equipment supply connections and cooling circuit zone valve assemblies; plant utility water supply header 2" IPS drain valve and blowoff branch connections; process supply header 2" IPS chemical injection supply branch connections where the 9875-338 provides 2" IPS socket PVC connections to chemical injection assemblies and treatment chemical supply connections at process header chemical treatment locations; process supply header 2" IPS instrument supply and sample connection branches where the 9875-338 provides 2" IPS socket PVC supply to pressure gauge connections, flow transmitter supply assemblies, and process sample assemblies; and process header 2" IPS air release and vacuum break valve supply branch connections at process header high-point locations; Schedule 40 white PVC satisfies the material specification at process header 2" branch junction locations where Schedule 40 is the system material standard
• Municipal Well Field & Water Supply Infrastructure — 45-Degree 2" IPS Branch Connections at Distribution Header Zone Supply Branches, Chemical Injection Supply Connections, Drain Assembly Branches, Air Release Valve Supply Connections, and Instrument Supply Branches on 3" Schedule 40 PVC Distribution Headers — Installed at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC distribution headers in municipal well field and water supply infrastructure — primary distribution header 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to service zone supply assemblies, zone valve connections, and downstream service distribution connections; distribution header 2" IPS chemical injection supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to chlorination injection assembly connections, fluoridation supply connections, pH adjustment chemical supply assemblies, and water treatment chemical injection station connections; distribution header 2" IPS drain valve and blowoff valve branch connections at header drain and blowoff locations; distribution header 2" IPS air release and vacuum breaker valve supply branch connections at header high-point locations; distribution header 2" IPS instrument supply and sample connection branches at monitoring and control locations; NSF 61 listing confirms potable water fitness at every well field distribution header 2" branch connection
• HVAC & Large Commercial Mechanical Systems — 45-Degree 2" IPS Branch Connections at Chilled Water Zone Supply Branches, Condenser Water Equipment Supply Branches, Drain Assembly Connections, Chemical Treatment Supply Branches, and Instrument Supply Connections on 3" Schedule 40 PVC Distribution Headers — Used at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC primary chilled water distribution headers, condenser water distribution headers, and large-capacity hydronic distribution headers in commercial campus and institutional mechanical systems — campus chilled water distribution header 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to building unit supply connections, zone supply valve assemblies, and campus sector mechanical room supply connections; condenser water distribution header 2" IPS equipment supply and zone valve branches where the 9875-338 provides 2" IPS socket PVC supply to cooling tower circuit valve assemblies and condenser water equipment supply connections; primary distribution header 2" IPS drain valve branch connections at header drain locations; primary distribution header 2" IPS chemical treatment supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to cooling water treatment chemical injection assemblies; primary distribution header 2" IPS air release valve supply branches at header high-point locations; and primary distribution header 2" IPS instrument supply and sample connection branches at monitoring and control locations; Schedule 40 white PVC satisfies the material specification where Schedule 40 is the system standard
• Aquaculture & Large-Scale Water Management Infrastructure — Installed at 2" IPS socket PVC branch connection locations on 3" Schedule 40 PVC primary supply, recirculation, and distribution mains in commercial aquaculture facilities, hatchery systems, and recirculating aquaculture systems (RAS) — primary recirculation main 2" IPS zone supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to individual tank system supply connections, zone supply valve assemblies, and production area recirculation distribution connections; primary supply main 2" IPS zone supply and lateral supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to individual hatchery unit supply connections, incubation tray supply assemblies, and rearing unit zone supply valve connections; primary supply main 2" IPS chemical treatment supply branch connections where the 9875-338 provides 2" IPS socket PVC supply to water quality treatment chemical injection assemblies — sodium bicarbonate supply connections, salt solution injection supply connections, carbon dioxide injection supply connections, and water conditioner supply connections; recirculation main 2" IPS drain and blowoff branch connections at major drain and blowoff locations; recirculation pump suction manifold 3" IPS header 2" IPS branch supply entries where the 9875-338 provides smooth 45-degree branch supply entries at individual recirculation pump suction supply connection points — the ~2.25x velocity increase at the 2" branch on the 3" suction header amplifying the absolute suction-side minor loss at the branch entry relative to the equivalent 4" suction manifold entry, and the 45-degree entry geometry providing correspondingly greater NPSH preservation benefit; facility drainage collection main 2" IPS lateral connections where the 9875-338 provides smooth 45-degree 2" IPS gravity drainage lateral branch connections to the 3" facility drainage collection main at production area drainage outlets and equipment drain assembly entry points; primary supply main 2" IPS air release valve supply branch connections at high-point locations; NSF 61 listing confirms fitness for every 2" IPS socket branch connection in the primary aquaculture supply and recirculation distribution system