Tee, Slip x Slip x Slip PVC Schedule 40 10" x 10" x 2 1/2" (401-622)

The 10" x 10" x 2-1/2" Schedule 40 White PVC Reducing Tee (401-622, Slip x Slip x Slip) is a large-diameter thermoplastic reducing tee fitting manufactured to ASTM D2466 in Schedule 40 white PVC — in which both run connections are 10" IPS slip socket ends and the branch connection is a 2-1/2" IPS slip socket end, providing a single-body Schedule 40 PVC solution for connecting a 2-1/2" IPS socket PVC branch assembly perpendicularly to a 10" Schedule 40 PVC primary run at a branch location where the 10" primary run continues at full diameter through both straight-run ports downstream of the 2-1/2" branch connection, without a saddle tap, without field fabrication, without transitioning out of Schedule 40 white PVC construction at the primary main branch point, and without interrupting the 10" primary run's continuity at the branch location. The 401-622 is the correct fitting wherever a 10" Schedule 40 PVC primary main must provide a 2-1/2" IPS socket PVC perpendicular branch connection while maintaining the full 10" primary run diameter through both run sockets — where the 2-1/2" downstream branch system is permanently bonded socket PVC construction continuing in 2-1/2" IPS socket PVC pipe and fittings from the tee's branch socket, where the primary main must continue downstream of the 2-1/2" branch at full 10" diameter serving additional primary distribution or transmission demands, and where the branch connection must be a manufactured, rated, NSF-listed, ASTM D2466-compliant Schedule 40 white PVC tee body whose 2-1/2" branch socket accepts standard 2-1/2" IPS Schedule 40 or Schedule 80 PVC pipe directly in the factory-formed female socket of the tee's branch port. Positioned below the 401-623 (10"x10"x3" at 30%) and above the next smaller 2" branch configuration in the Spears 401 series at the 10" run service level, the 401-622 occupies the transitional branch size position where the 2-1/2" IPS socket branch's commercial identity is defined by depth of application in specific and institutionally consequential application categories rather than breadth across all appurtenance types — most prominently in fire protection supply assemblies, standpipe system supply laterals, wet barrel fire hydrant supply legs, and fire department connection supply laterals whose downstream construction is permanently bonded socket PVC pipe continuation from the perpendicular branch socket, and in specific appurtenance, pump connection, and zone supply assemblies where the manufacturer's specification or system design has established 2-1/2" IPS socket PVC as the required downstream branch construction type.

The 401-622's position within the Spears 401 series all-socket reducing tee line at the 10" run service level is fully defined by the 25% branch-to-run ratio and the 2-1/2" IPS branch size's specific commercial character among large-bore IPS socket PVC branch sizes — the same commercial character established at the 402-622 page for the 2-1/2" FPT branch configuration and applied here at the all-socket branch tee level with the downstream construction type distinction that separates the 401-622 from the 402-622. Below the 401-623 in the series, where the 3" branch at 30% provides the broadest downstream application range of any large-bore appurtenance branch size in the 10" run series, the 401-622 arrives at a branch size whose commercial application breadth is more concentrated than the 3" branch above it and whose most commercially prominent application — fire protection supply assembly in socket PVC construction — is defined by the same industry-standard supply connection size specificity that defines the 402-622's fire protection application prominence in the FPT branch configuration. The 2-1/2" IPS nominal pipe size occupies a position in the commercial PVC socket fitting market where its application prevalence is determined more by institutional and code-driven specification standards than by the broad commercial availability that characterizes the 3" and 2" IPS sizes on either side of it in the IPS nominal pipe size series. In fire protection, the 2-1/2" nominal connection is the industry-standard supply size embedded in the National Fire Protection Association's standards governing fire department connections, standpipe hose valve supply assemblies, and wet barrel fire hydrant supply connections throughout the United States commercial and municipal fire protection market — standards that establish 2-1/2" as the supply connection size not as a market selection but as a code requirement, and whose downstream supply laterals and supply legs in socket PVC construction require the 401-622's 2-1/2" socket branch, not the 3" socket branch of the 401-623 above it and not the 2" socket branch of the next smaller configuration below it.

The 2-1/2" socket branch's fire protection application prominence is the primary commercial identity of the 401-622 and distinguishes it most sharply from both adjacent configurations in the Spears 401 series at the 10" run level. At fire protection supply lateral, standpipe supply, and wet barrel hydrant supply branch locations on 10" Schedule 40 PVC primary mains where the downstream supply assembly is permanently bonded socket PVC pipe and fitting construction — where the supply lateral exits the tee's 2-1/2" branch socket in 2-1/2" IPS schedule PVC pipe that continues in socket PVC construction through socket PVC fittings, socket PVC isolation valve bodies, and socket PVC pipe to the fire protection system's above-grade entry point — the 401-622 is the correct and only appropriate all-socket reducing tee in the Spears 401 series at the 10" run level. The 3" branch of the 401-623 cannot serve a 2-1/2" IPS socket PVC fire protection supply lateral without a reducing bushing adapter at the branch socket entry — an adapter approach that is not appropriate at a primary main fire protection supply branch where the supply lateral must connect directly from the tee body's branch socket to the 2-1/2" IPS socket PVC supply lateral pipe in a single permanently bonded socket joint. The 2" socket branch of the next smaller configuration below the 401-622 in the series cannot serve a 2-1/2" IPS supply lateral without an enlarging adapter — equally inappropriate at a primary main fire protection supply branch. The 401-622's 2-1/2" socket branch is the only all-socket tee configuration in the Spears 401 series at the 10" run level that connects directly to a 2-1/2" IPS socket PVC fire protection supply lateral in a single unreduced, unadapted, permanently bonded socket cement joint at the primary main branch point.

The fire protection supply lateral construction type distinction — the governing selection between the 401-622 all-socket tee and the 402-622 FPT branch tee at fire protection supply branch locations on 10" primary mains — is the most consequential specification decision in the fire protection supply primary main tee BOM and must be resolved before either fitting is purchased. The 402-622's 2-1/2" FPT branch accepts fire protection supply components whose primary main connection interface is inherently male NPT threaded — fire department connection supply bodies, standpipe supply bodies, and wet barrel hydrant supply connections whose manufacturers have designed the underground primary main interface as a 2-1/2" male NPT threaded connection that threads directly into the 402-622's FPT branch port. The 401-622's 2-1/2" socket branch accepts 2-1/2" IPS socket PVC pipe that continues in permanently bonded socket PVC construction from the tee's branch socket through the supply lateral's entire below-grade run to the fire protection system's connection point. The selection between these two tee configurations at any fire protection supply branch location is determined entirely by the downstream supply lateral's construction type from the primary main tee body outward — if the first element exiting the tee branch is 2-1/2" IPS socket PVC pipe in a cement-bonded socket connection, the 401-622 is correct; if the first element connecting to the tee branch is a male NPT threaded fire protection supply body or assembly, the 402-622 is correct. This construction type determination must be made from the fire protection system's supply lateral design drawings before purchasing either fitting, and cannot be assumed from the fire protection application category alone — both socket PVC supply lateral construction and male NPT threaded supply body construction are in active commercial use at 2-1/2" fire protection supply primary main branch connections in the US commercial and municipal fire protection market, and the fire protection system designer's specification for the supply lateral construction type is the governing authority on which tee configuration is correct at each branch location.

Beyond fire protection, the 2-1/2" socket branch's downstream application range extends to specific appurtenance, pump connection, zone supply, and chemical injection assembly applications where the downstream assembly is in 2-1/2" IPS socket PVC construction and the manufacturer's specification or system design has established 2-1/2" IPS as the required downstream pipe size. The complete range of 2-1/2" IPS socket PVC downstream assemblies served by the 401-622's branch socket includes: 2-1/2" IPS socket PVC gate valve and ball valve assemblies for primary main blowoff, drain, and isolation service in socket PVC construction — where the valve body is a socket PVC valve with 2-1/2" IPS socket connections on both ports rather than a male NPT threaded valve body; 2-1/2" IPS socket PVC pipe continuation for drain assembly legs, blowoff assembly discharge pipes, and appurtenance supply pipes where the downstream assembly continues in permanently bonded 2-1/2" socket PVC pipe and fitting construction from the tee's branch socket; standpipe system and fire protection supply laterals in 2-1/2" IPS socket PVC construction as described above; specific secondary pump suction supply assemblies where a secondary pump's supply connection to the 10" primary main is designed as a 2-1/2" IPS socket PVC assembly whose perpendicular branch connection to the primary run is through the 401-622's socket branch; primary main chemical injection and treatment chemical supply assemblies in 2-1/2" IPS socket PVC construction where the injection assembly's primary main branch connection is a permanently bonded 2-1/2" socket PVC pipe from the tee's branch socket; zone supply assemblies where the primary distribution main's perpendicular zone supply branch has been hydraulically sized and designed as a 2-1/2" IPS socket PVC supply continuation; and major flushing and commissioning assembly connections where 2-1/2" IPS socket PVC valve assemblies at primary main near-dead-end or distribution boundary locations provide system commissioning flushing, water age management, and seasonal flushing functions through perpendicular branch connections on the continuing 10" primary run. Across all of these non-fire-protection applications, the governing specification principle is the same as in fire protection: the downstream assembly is in 2-1/2" IPS socket PVC construction, the first element from the tee's branch socket is 2-1/2" IPS socket PVC pipe in a permanently bonded cement joint, and the 401-622 is the correct tee body at the primary main branch location because its 2-1/2" socket branch provides the direct, unreduced, unadapted socket connection to the downstream assembly's 2-1/2" IPS socket PVC pipe.

The specification comparisons at the 401-622 parallel the three-comparison framework established at the 401-623 page and extend it with fire-protection-specific precision at the 2-1/2" branch size. The first and most important comparison is the all-socket versus FPT branch selection between the 401-622 and the 402-622 — resolved by the downstream 2-1/2" branch component's construction type as described above, and carrying its highest commercial significance at fire protection supply branch locations where both socket PVC supply lateral construction and male NPT threaded supply body construction are in active use. The second critical comparison is the perpendicular reducing tee versus inline reducer coupling selection — the 401-622's three-port perpendicular tee with continuing 10" run versus the inline two-port Schedule 80 reducer coupling at the 10"x2-1/2" size combination (if stocked in the Spears 829 series) whose entire primary main flow path transitions inline from the 10" large-end socket to the 2-1/2" small-end socket at a terminal end-of-run location with no continuing 10" run port. The 401-622 is correct where the 10" primary main continues downstream of the 2-1/2" branch connection; the inline reducer coupling is correct where the 10" primary main terminates at the 2-1/2" connection and the entire end-of-run flow transitions to the 2-1/2" downstream assembly. The third critical comparison is the branch size selection within the Spears 401 series at the 10" run — specifically between the 401-622 (2-1/2" at 25%), the 401-623 (3" at 30%) above it, and the 2" branch configuration below it. The selection among these three adjacent configurations is determined by the downstream assembly's required IPS pipe size, confirmed from the fire protection system's supply lateral design drawings, the appurtenance manufacturer's connection specification, or the hydraulic design's branch demand analysis — not assumed from the application category alone. At fire protection supply branches, the 2-1/2" IPS pipe size requirement is code-driven and non-negotiable; at non-fire-protection appurtenance branches, the correct branch size is determined from the downstream demand analysis and the specified construction standard.

The AHJ confirmation requirement unique to fire protection applications at the 401-622 — established at the 402-622 page and applied here with full force — adds a fourth specification consideration that does not appear at non-fire-protection reducing tee applications in the Spears 401 series. At fire department connection supply lateral, standpipe supply lateral, and wet barrel fire hydrant supply branch locations where the 401-622 is specified, the branch port's 90-degree angular orientation relative to the 10" primary run axis determines the spatial routing direction of the 2-1/2" IPS socket PVC supply lateral from the primary main branch point — and this spatial routing direction must be confirmed against the fire protection system layout drawing and the authority having jurisdiction's (AHJ's) installation requirements before the run socket cement joints are made at either 10" run socket on the 401-622 body. At fire protection supply branch locations, the fire protection system designer's layout drawing establishes the required routing direction of the supply lateral from the primary main tee body — the direction toward the building served, the fire department connection assembly location, the standpipe riser entry point, or the wet barrel hydrant installation location — and this required routing direction must match the 401-622's branch socket orientation before cement is applied. The orientation is committed simultaneously with the run socket cement joints and cannot be adjusted without full joint destruction at all three sockets. The AHJ's installation requirements for fire department connection and standpipe supply assemblies frequently specify the supply lateral's angular approach direction relative to the building served, the fire lane access path, and the street frontage — requirements that, if not confirmed against the 401-622's branch socket orientation before cement application, can result in a permanently installed tee body whose branch socket exits in the wrong direction relative to the fire protection system's required supply lateral routing, requiring primary main disassembly and tee replacement to correct.

The 401-622's hydraulic behavior at the 25% branch-to-run ratio establishes hydraulic accounting requirements proportional to its low lateral ratio position in the Spears 401 series at the 10" run level. At 25%, the 2-1/2" branch carries a low fraction of the 10" primary run's design flow under normal branch service conditions — the 10" primary run's hydraulic dominance over the 2-1/2" branch is pronounced at all normal primary distribution operation conditions when the branch valve is closed, at standby, or at low-service flow, and the tee junction's effect on the primary run's velocity, pressure, and flow profile at these conditions is effectively negligible. The hydraulic accounting requirement at the 401-622 is most demanding at fire flow demand events — the branch service scenario unique to fire protection supply applications where the 2-1/2" supply lateral must deliver design fire flow at the fire protection system's minimum required supply pressure while the 10" primary main simultaneously satisfies minimum residual pressure requirements at the most remote concurrent domestic service point downstream. This fire flow hydraulic analysis is the most consequential branch service event at the 401-622 — the same fire flow analysis requirement established at the 402-622 page for the FPT branch configuration applies identically at the 401-622 socket branch configuration — and must be performed explicitly before the fitting is finalized in the primary main system design at fire protection supply branch locations: the primary system engineer must confirm the available pressure at the 401-622 branch location under design fire flow conditions, confirm that the 2-1/2" branch socket's supply lateral delivers the design fire flow at the fire protection system's minimum required supply pressure, and confirm that the primary run's residual downstream pressure under simultaneous fire flow demand and domestic service conditions remains above minimum distribution system requirements at the most remote downstream service point. At non-fire-protection branch service events — blowoff operations, chemical injection at peak dose rates, secondary pump suction supply at maximum pump output, and zone supply at peak demand — the 25% low lateral ratio's hydraulic accounting requirement is proportionally less demanding than the fire flow scenario but must still be included in the primary system's hydraulic model at peak branch service event conditions. In primary main systems with multiple 401-622 tee bodies along the same 10" primary run at different fire protection supply branch locations — a common configuration in large commercial campus, institutional, and municipal distribution systems where multiple fire protection supply laterals connect to the same 10" primary distribution main — the cumulative effect of all tee junction pressure losses on the primary run's pressure profile under simultaneous fire flow demand from multiple supply lateral locations must be modeled as a complete assembly in the primary system's hydraulic analysis.

The assembly requirements at the 401-622 reflect the pronounced size asymmetry between its two 10" run sockets and its single 2-1/2" branch socket — greater in scale than the asymmetry at the 401-623's 10"x3" size differential, reflecting the 2-1/2" branch's smaller IPS size relative to the 10" run. Both 10" run socket connections require the full large-diameter heavy-body Schedule 40 PVC assembly discipline established at every 10" Schedule 40 socket fitting in this catalog: pre-planned assembly with both 10" run pipe ends fully positioned before any cement application begins, complete circumferential heavy-body cement coverage at both 10" bonding surfaces within the available working time, and full cure time compliance before any system pressurization. The 2-1/2" branch socket requires the assembly standard appropriate for 2-1/2" IPS Schedule 40 or Schedule 80 PVC pipe — a substantially smaller bonding surface than either 10" run socket, with correspondingly shorter working time and lower cement volume requirements. The complete assembly sequence must be planned with all three pipe ends positioned and accessible before cement application begins at any socket — the branch socket's 90-degree orientation relative to the run axis confirmed against the piping layout drawing and the fire protection system's supply lateral routing requirements by dry-fit before cement is applied at any of the three sockets. At the 401-622's 25% branch-to-run size differential, the 2-1/2" branch socket's visual and tactile distinction from the 10" run sockets is the most reliable field indicator of the fitting's branch port location during assembly, and the assembler must confirm not only that the branch socket faces the intended downstream 2-1/2" assembly routing direction but that the AHJ's installation requirements for the fire protection supply lateral's routing direction from the primary main branch point are satisfied by the branch socket's orientation before cement application begins at either run socket. Apply complete circumferential heavy-body cement coverage at all three socket connections within the available working time for each socket size, comply fully with cure time requirements before any system pressurization, and deburr and bevel all three pipe ends — both 10" run pipe ends and the 2-1/2" branch pipe end — before cementing to ensure consistent insertion depths and complete circumferential bond lines at every socket connection.

Engineered concrete thrust block or mechanical joint restraint is required at the 401-622's perpendicular 2-1/2" branch port at buried installations — the 90-degree perpendicular branch direction change produces an unbalanced hydraulic thrust force in the branch direction proportional to the branch pipe's operating pressure and 2-1/2" cross-sectional area. At the 25% branch-to-run ratio, the 2-1/2" branch port's thrust force is smaller in absolute magnitude than the 3" branch port of the 401-623 at the same operating pressure, reflecting the smaller cross-sectional area of the 2-1/2" IPS pipe relative to 3" IPS — but not zero at the 10" primary main service pressure level and requiring a site-specific engineered thrust block design accounting for soil bearing conditions, operating pressure, and 2-1/2" branch pipe cross-sectional area at each buried 401-622 installation location. At fire protection supply branch locations where the primary main's operating pressure includes the static system pressure at the branch location and potentially the surge transient pressure from fire flow startup, the thrust block design must be confirmed under the full range of anticipated operating conditions including transient pressure events. No thrust restraint is required at either 10" run port — the run ports are inline connections producing no angular thrust force component in the run direction, and thrust restraint at the run connections is addressed through the primary run's pipe anchoring and support design rather than through thrust blocks at the tee body.

The schedule selection at the 401-622 — Schedule 40 over the Schedule 80 counterpart at the 10"x10"x2-1/2" all-socket reducing tee configuration — follows the engineering framework established across all 10" Schedule 40 specialty fitting pages 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 10" 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 primary main branch location including the combined pressure and branch thrust loading at the 2-1/2" perpendicular branch port under primary main operating conditions. At fire protection supply branch locations on 10" primary mains where the static system pressure at the branch location and the anticipated surge transient from fire flow demand startup must both be confirmed within the Schedule 40 pressure ceiling, the schedule selection requires explicit attention to the complete range of operating conditions at the fire protection supply branch before Schedule 40 material class is finalized. Where the system requires Schedule 80 wall thickness, gray material class identification, or the higher pressure ceiling that Schedule 80 provides at large-diameter primary main reducing tee fittings, the Schedule 80 counterpart at the 10"x10"x2-1/2" reducing tee configuration is the correct specification.

Schedule 40 white PVC construction provides the chemical resistance, NSF certification, and structural capability appropriate for large-diameter primary main reducing tee branch 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 water treatment chemicals, process water service, industrial utility water, and the full range of non-solvent process fluids appropriate for Schedule 40 PVC primary main service at all three socket connections. The white color provides the permanent, inspectable Schedule 40 material class identification at the primary main branch location. The 2-1/2" branch socket is compatible with both Schedule 40 and Schedule 80 2-1/2" IPS PVC pipe — the schedule of the 2-1/2" downstream branch pipe is selected based on the downstream assembly's own design requirements, including the fire protection system's supply lateral pipe schedule specification, rather than constrained by the 401-622's socket geometry.

NSF 61 certification lists this fitting for potable water contact, and NSF 14 covers compliance with applicable plastics piping material standards — making it the correct Schedule 40 PVC all-socket reducing tee for municipal water distribution systems supplying fire protection and appurtenance branch connections, large potable water pump station primary headers, and large commercial and institutional water supply primary mains where NSF-listed materials are required at every fitting in the primary distribution system including tee bodies at primary main fire protection supply, appurtenance, drain, blowoff, and zone supply branch locations. ASTM D2466 governs Schedule 40 PVC socket fittings and defines the manufacturing, dimensional, and pressure performance requirements the 401-622 is produced to. Verify manufacturer pressure rating documentation for the specific fitting configuration before final system specification — at the 10"x10"x2-1/2" reducing tee configuration, the governing pressure rating is determined by the 10" run port size and the fitting's tested performance at this large-diameter minimal-lateral reducing tee geometry, and must be confirmed against the manufacturer's published pressure-temperature rating table for SKU 401-622 before installation in systems at or near the fitting's rated pressure ceiling.

Key Features:

• Schedule 40 white PVC reducing tee — 10" x 10" run (slip socket) x 2-1/2" branch (slip socket), all socket (slip) ends; Spears 401 series Schedule 40 PVC socket fittings
• 2-1/2" socket branch for fire protection supply assemblies in socket PVC construction — fire department connection supply laterals, standpipe system supply laterals, wet barrel fire hydrant supply legs, and Class I and III standpipe riser supply connections whose downstream supply lateral is permanently bonded 2-1/2" IPS socket PVC pipe and fitting construction exiting the tee's branch socket; 2-1/2" IPS is the industry-standard supply connection size for these fire protection assemblies by NFPA standard; the 401-622 is the correct and only all-socket tee at this branch size for these applications
• 2-1/2" branch at 25% of 10" run diameter — low lateral ratio; 10" primary run hydraulically dominant at all normal distribution conditions; branch flow fraction most hydraulically demanding at fire flow demand events; fire flow hydraulic analysis is the governing branch service hydraulic confirmation at fire protection supply branch locations
• AHJ installation requirement confirmation required at fire protection supply branches — branch socket orientation relative to the 10" run axis determines the 2-1/2" supply lateral's routing direction from the primary main branch point; must be confirmed against the fire protection system layout drawing and the authority having jurisdiction's (AHJ's) installation requirements before cement is applied at either run socket; orientation committed simultaneously with run socket cement joints
• First critical comparison — all-socket branch versus FPT branch: 401-622 where downstream 2-1/2" branch assembly continues in socket PVC pipe and fitting construction; 402-622 (10"x10"x2-1/2" FPT branch tee) where downstream 2-1/2" branch component is inherently male NPT threaded; at fire protection supply branches both socket PVC supply lateral construction and male NPT threaded supply body construction are in active commercial use — confirm downstream construction type from fire protection system supply lateral design drawings before purchasing either fitting
• Second critical comparison — perpendicular reducing tee versus inline reducer coupling: 401-622 where 10" primary run continues downstream of the 2-1/2" branch and the branch exits perpendicularly; inline 10"x2-1/2" Schedule 80 reducer coupling where 10" primary main terminates at the 2-1/2" connection and entire end-of-run flow transitions inline to the 2-1/2" downstream assembly; primary main continuation requirement determines which fitting is correct
• Third critical comparison — branch size selection: 401-623 (3" branch at 30%) where downstream assembly is 3" IPS socket PVC and fire protection, appurtenance, or zone supply demand has been confirmed at 3" IPS supply capacity; 401-622 (2-1/2" branch at 25%) where downstream assembly is 2-1/2" IPS socket PVC — at fire protection supply branches the 2-1/2" IPS size is code-driven and non-negotiable; next smaller 2" branch where downstream assembly is 2" IPS socket PVC; confirm from fire protection design drawings, appurtenance manufacturer specification, or hydraulic demand analysis
• Thrust restraint required at buried 2-1/2" branch port — 90-degree perpendicular branch produces unbalanced hydraulic thrust force; engineered concrete thrust block or mechanical joint restraint required at buried installations; thrust block bearing area calculated site-specifically from soil conditions, operating pressure, and 2-1/2" branch cross-sectional area; at fire protection supply branches, thrust block design must be confirmed under full range of operating conditions including surge transient from fire flow startup; no thrust restraint required at either 10" run port
• Branch socket orientation committed at run socket cement application — 2-1/2" branch socket angular direction fixed when run socket joints are made; confirm against piping layout, fire protection system design, and AHJ requirements before cementing any socket; size asymmetry between 2-1/2" branch socket and 10" run sockets is the most reliable visual orientation aid during field assembly
• Both 10" run socket connections require full large-diameter heavy-body cement assembly discipline; 2-1/2" branch socket requires standard 2-1/2" IPS assembly discipline; plan complete three-socket assembly sequence with all pipe ends positioned before any cement application begins; full cure time compliance before pressurization
• 2-1/2" branch socket accepts Schedule 40 and Schedule 80 2-1/2" IPS PVC pipe — downstream branch pipe schedule selected from downstream assembly design requirements including fire protection system supply lateral pipe schedule specification
• Schedule 40 vs. Schedule 80 selection: Schedule 40 correct where system pressure, surge, fire flow transient, and safety margin requirements fall within Schedule 40 pressure ceiling; verify against Schedule 80 counterpart before final specification at fire protection supply branch locations
• Manufactured to ASTM D2466 — governing standard for Schedule 40 PVC socket fittings
• NSF 61 certified for potable water contact; NSF 14 listed
• Run socket connections compatible with Schedule 40 and Schedule 80 IPS 10" pipe; branch socket compatible with Schedule 40 and Schedule 80 IPS 2-1/2" pipe
• White color — standard Schedule 40 material class identification at the primary main reducing tee branch 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
• Pressure rating: verify against manufacturer pressure-temperature table for SKU 401-622

Specifications:

Industries & Applications:

• Municipal Water Distribution — Primary Transmission and Distribution Main Fire Department Connection Supply Laterals, Standpipe Supply Laterals, Wet Barrel Hydrant Supply Legs, Blowoff Assembly Branches, Air Release Valve Supply Connections, and Appurtenance Branch Points on 10" Schedule 40 Primary Mains Where the Downstream 2-1/2" Branch Assembly is in Socket PVC Construction — The 10" x 10" x 2-1/2" Schedule 40 all-socket reducing tee is specified at 2-1/2" IPS socket PVC branch assembly locations on 10" municipal water transmission and primary distribution mains in Schedule 40 PVC systems where the primary run continues downstream and the downstream branch assembly is permanently bonded socket PVC pipe and fitting construction; fire department connection supply laterals where the 10" primary distribution main supplies a fire department connection (FDC) assembly through a 2-1/2" IPS socket PVC supply lateral — the 401-622 providing the primary main tee body at the FDC supply lateral branch location where the 2-1/2" IPS socket PVC supply lateral pipe exits the tee's perpendicular branch socket in a permanently bonded cement joint and continues in 2-1/2" IPS socket PVC construction below grade to the FDC assembly's below-grade supply entry point; the 10" primary distribution main continuing at full diameter through both run ports downstream of the FDC supply lateral branch connection to supply additional downstream distribution and fire protection connections; standpipe system supply lateral branches where Class I or Class III standpipe systems' primary water supply laterals connect to the 10" primary distribution main through 2-1/2" IPS socket PVC supply lateral assemblies from the 401-622's perpendicular branch socket, the 10" primary distribution main continuing downstream to supply additional service areas and fire protection connections beyond the standpipe supply branch location; wet barrel fire hydrant supply leg branches where wet barrel fire hydrant underground supply legs in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary distribution main through the 401-622's branch socket — the 10" primary main continuing at full diameter through both run ports to supply additional hydrants, service zones, and fire protection connections downstream of the hydrant supply branch; primary transmission main high-point large-capacity combination air release and vacuum breaker valve supply branches where 2-1/2" IPS socket PVC combination air valve supply assemblies connect perpendicularly to the 10" primary transmission main while the primary main continues downstream at full 10" diameter; primary main major low-point drain and blowoff assembly branches where 2-1/2" IPS socket PVC drain valve and blowoff assemblies connect perpendicularly to the 10" primary main while the primary main continues downstream; primary main flushing and water age management assembly branches where 2-1/2" IPS socket PVC flushing valve assemblies at primary main near-dead-end and distribution boundary locations connect perpendicularly to the continuing 10" primary run; and primary main large service lateral supply branches where individual large building or campus supply laterals continue in 2-1/2" IPS socket PVC construction from the 401-622's perpendicular branch socket; NSF 61 listing confirms potable water fitness at every municipal distribution primary main 2-1/2" socket branch connection; fire flow hydraulic analysis at each fire protection supply branch location must confirm available pressure satisfies minimum fire protection supply pressure at design fire flow demand while primary run residual downstream pressure satisfies minimum distribution system requirements at most remote concurrent service point; AHJ confirmation of branch orientation required before run socket cement joints at all fire protection supply branch installations; engineered thrust block design at each buried 401-622 branch port is mandatory and calculated site-specifically including fire flow transient pressure conditions
• Commercial and Institutional Fire Protection — Primary Supply Main Fire Department Connection Supply Laterals, Standpipe Supply Laterals, Fire Sprinkler Riser Supply Connections, and Fire Protection Grid Supply Branches in Socket PVC Construction on 10" Schedule 40 Primary Supply Mains — Installed at 2-1/2" IPS socket PVC fire protection supply lateral branch locations on 10" primary water supply mains serving large commercial, institutional, and campus fire protection systems where the downstream supply lateral is in 2-1/2" IPS socket PVC pipe and fitting construction and the primary supply main continues downstream at full 10" diameter — primary supply main fire department connection supply lateral branches where commercial building and campus structure FDC supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary supply main through the 401-622's branch socket, the 2-1/2" IPS socket PVC supply lateral continuing below grade from the tee's branch socket to the FDC assembly's below-grade supply entry point while the 10" primary supply main continues downstream to serve additional building FDC supply laterals, standpipe supply connections, and fire sprinkler system supply connections along the campus primary supply main route; primary supply main Class I and Class III standpipe system supply lateral branches where standpipe riser supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary supply main while the primary supply main continues downstream; campus fire protection grid primary supply main wet barrel hydrant supply leg branches where campus fire protection grid wet barrel hydrant supply legs in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" campus primary supply main while the primary supply main continues to supply additional campus fire protection system connections; campus primary supply main fire sprinkler system riser supply lateral branches where fire sprinkler system riser supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" campus primary supply main through the 401-622's branch socket; fire protection system primary supply main test header supply lateral branches where test header supply assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary supply main; and campus primary supply main drain and appurtenance branches where 2-1/2" IPS socket PVC appurtenance and maintenance assemblies connect perpendicularly to the continuing 10" campus primary supply main; the fire protection system's minimum required supply pressure at maximum design fire flow demand must be confirmed against the 10" primary supply main's available pressure at each 401-622 branch location under fire flow demand conditions with simultaneous domestic service flow on the primary supply main; AHJ installation requirements for all fire department connection, standpipe, and hydrant supply lateral orientations must be confirmed against the 401-622's branch socket orientation before run socket cement joints are made at every fire protection supply branch installation
• Water Treatment Plant — Primary Header Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Drain Assembly Branches, Chemical Dosing Supply Branches, and Equipment Supply Connections in Socket PVC Construction on 10" Schedule 40 Primary Distribution Headers — Used at 2-1/2" IPS socket PVC branch assembly locations on 10" primary distribution headers in municipal and industrial water treatment plants where the primary header continues downstream of the 2-1/2" branch connection — treatment facility fire protection primary supply main FDC and standpipe supply lateral branches where the treatment facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary service water or distribution header while the header continues downstream; filter gallery primary header zone supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary header and supply individual filter gallery process sections while the primary header continues downstream at full 10" diameter; plant service water primary header air release valve supply branches where 2-1/2" IPS socket PVC combination air valve supply assemblies connect perpendicularly to the 10" primary service water header at high-point branch locations; primary distribution header drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary header at low-point drain locations while the header continues downstream; primary distribution header chemical dosing supply branches where chemical dosing assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary distribution header at chemical injection branch points; primary distribution header secondary pump suction supply branches where 2-1/2" IPS socket PVC secondary pump suction supply assemblies connect perpendicularly to the continuing 10" primary distribution header; and primary distribution header individual equipment supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary header and supply individual process equipment at treatment facility equipment branch locations; NSF 61 listing confirms potable water fitness at every water treatment plant primary header 2-1/2" socket branch connection
• Pump Station — Primary Header Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Connections, Chemical Injection Supply Branches, Drain Assembly Branches, and Secondary Pump Supply Connections in Socket PVC Construction on 10" Schedule 40 Primary Headers — Specified at 2-1/2" IPS socket PVC branch assembly locations on 10" primary pump station suction and discharge headers where the primary header continues downstream of the 2-1/2" branch connection — pump station facility fire protection primary supply main FDC and standpipe supply lateral branches where the pump station facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary service water header while the header continues downstream; pump station primary discharge header zone supply branches where 2-1/2" IPS socket PVC zone supply assemblies connect perpendicularly to the 10" primary discharge header and supply individual service zones and distribution connections while the header continues downstream; pump station primary discharge header high-point combination air release valve supply branches where 2-1/2" IPS socket PVC air valve supply assemblies connect perpendicularly to the 10" primary discharge header at high-point branch locations while the header continues downstream; pump station primary header drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary header at low-point drain branch locations while the header continues downstream; pump station primary discharge header chemical injection supply branches where chemical dosing assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary discharge header at chemical injection branch points; pump station primary discharge header blowoff assembly branches where 2-1/2" IPS socket PVC blowoff valve assemblies connect perpendicularly to the continuing 10" primary discharge header through the 401-622's branch socket; and secondary and standby pump suction supply branches where 2-1/2" IPS socket PVC secondary pump suction supply assemblies connect perpendicularly to the continuing 10" primary suction header; at pump stations where primary headers operate at full system pressure including shut-off head and surge, Schedule 40 pressure ceiling confirmation at the 401-622 installation location is required before Schedule 40 material class is finalized
• Large Commercial & Agricultural Irrigation — Primary Transmission Main Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Chemical Injection Supply Branches, Drain and Blowoff Assembly Branches, and Flushing Assemblies in Socket PVC Construction on 10" Schedule 40 Primary Mains — Installed at 2-1/2" IPS socket PVC branch assembly locations on 10" primary irrigation transmission mains at major golf course and resort irrigation systems, large-acreage agricultural operations, and regional landscape irrigation projects where the downstream branch assembly is in socket PVC construction — irrigation system facility fire protection supply lateral branches where golf course, resort campus, large commercial facility, and institutional campus fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" irrigation primary transmission main through the 401-622's branch socket while the primary transmission main continues downstream; irrigation primary transmission main zone supply branches where 2-1/2" IPS socket PVC zone supply valve and supply header assemblies connect perpendicularly to the 10" primary transmission main through the 401-622's branch socket and supply individual irrigation sectors and management zones whose demands have been sized at 2-1/2" IPS supply capacity from the hydraulic analysis while the primary transmission main continues downstream to additional zone supply branch locations; irrigation primary transmission main high-point large-capacity combination air release and vacuum breaker valve supply branches where 2-1/2" IPS socket PVC combination air valve supply assemblies connect perpendicularly to the 10" primary transmission main at high-point summit locations while the primary transmission main continues downstream; irrigation pump station primary discharge main chemical injection supply branches where chemical injection assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary discharge main while the primary discharge main continues downstream; irrigation primary transmission main blowoff and drain assembly branches where 2-1/2" IPS socket PVC blowoff valve and drain assemblies connect perpendicularly to the 10" primary transmission main at blowoff and drain branch stations while the primary transmission main continues downstream; and irrigation primary transmission main flushing and commissioning assembly branches where 2-1/2" IPS socket PVC flushing valve assemblies at near-dead-end and distribution boundary locations connect perpendicularly to the continuing 10" primary transmission main through the 401-622's branch socket; at large commercial irrigation systems where the primary transmission main serves dual irrigation and fire protection supply functions, the 401-622 appears at every fire protection supply lateral branch location where the supply lateral is in 2-1/2" IPS socket PVC construction and the primary transmission main continues downstream of the branch
• Industrial Process Piping — Primary Header Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Chemical Treatment Supply Branches, Drain Assembly Branches, and Secondary Equipment Supply Connections in Socket PVC Construction on 10" Schedule 40 Primary Headers — Used at 2-1/2" IPS socket PVC branch assembly locations on 10" process water primary headers, cooling water primary distribution trunks, and plant utility water primary mains in manufacturing plants, chemical processing facilities, and heavy industrial environments where the downstream branch assembly is in socket PVC construction and the primary header continues downstream — industrial facility fire protection primary supply main FDC and standpipe supply lateral branches where the plant facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary service water or utility water main while the primary main continues downstream; process water primary header zone supply and equipment supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary process water header and supply individual process sections and equipment zones while the primary header continues downstream; cooling water primary distribution trunk zone supply branches where 2-1/2" IPS socket PVC cooling water supply assemblies connect perpendicularly to the 10" primary cooling water trunk and supply individual heat exchanger and cooling equipment zones while the primary trunk continues downstream; plant utility water primary main drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary utility water main at low-point drain branch locations while the primary main continues downstream; primary process water header high-point air release valve supply branches where 2-1/2" IPS socket PVC combination air release valve supply assemblies connect perpendicularly to the 10" primary process water header at high-point branch locations; primary process water header chemical treatment supply branches where treatment chemical injection assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary process water header at chemical treatment injection branch points while the header continues downstream; and standby process pump suction supply branches where 2-1/2" IPS socket PVC secondary pump suction supply assemblies connect perpendicularly to the continuing 10" primary process water header through the 401-622's branch socket; Schedule 40 white PVC construction satisfies the material specification at primary process header 2-1/2" socket branch locations where Schedule 40 is the system material standard
• Municipal Well Field — Primary Collection and Distribution Header Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Chemical Injection Supply Branches, Drain Assembly Branches, and Secondary Supply Connections in Socket PVC Construction on 10" Schedule 40 Primary Headers — Specified at 2-1/2" IPS socket PVC branch assembly locations on 10" primary well field collection and distribution headers where the primary header continues downstream of the 2-1/2" branch connection — well field facility fire protection supply lateral branches where the well field facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary distribution header while the header continues downstream; primary distribution header zone supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary distribution header and supply individual service zones and pressure districts while the header continues downstream at full 10" diameter; primary distribution header high-point combination air release and vacuum breaker valve supply branches where 2-1/2" IPS socket PVC combination air valve supply assemblies connect perpendicularly to the 10" primary distribution header at high-point branch locations throughout the well field primary distribution network; pump station primary discharge header chemical treatment injection supply branches where chemical injection assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary distribution header at chemical injection branch points while the header continues downstream; primary collection and distribution header drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary header at low-point drain branch locations while the header continues downstream; and primary distribution header secondary pump suction supply branches where 2-1/2" IPS socket PVC secondary and standby pump suction supply assemblies connect perpendicularly to the continuing 10" primary distribution header through the 401-622's branch socket; at well field primary headers where pump operating pressures including shut-off head and surge must be confirmed within the Schedule 40 pressure ceiling at the 10" reducing tee service size, Schedule 40 material class confirmation is required for every 401-622 installation
• Water & Wastewater Treatment — Primary Process Header Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Chemical Dosing Supply Branches, Drain Assembly Branches, and Process Equipment Supply Connections in Socket PVC Construction on 10" Schedule 40 Primary Process Headers — Used at 2-1/2" IPS socket PVC branch assembly locations on 10" primary process distribution headers in industrial wastewater treatment, water reclamation, and large-scale industrial water management facilities where the primary process header continues downstream of the 2-1/2" branch connection — treatment facility fire protection supply lateral branches where the treatment facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary service water header while the header continues downstream; primary influent header zone supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary influent header and supply individual treatment trains and parallel process units while the primary header continues downstream; primary effluent distribution header zone supply branches where 2-1/2" IPS socket PVC effluent distribution assemblies connect perpendicularly to the 10" primary effluent header and supply reclaimed water use zones and downstream treatment connections while the header continues downstream; primary process distribution header high-point air release valve supply branches where 2-1/2" IPS socket PVC combination air release valve supply assemblies connect perpendicularly to the 10" primary process header at high-point branch locations; primary chemical distribution header dosing supply branches where chemical dosing assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary chemical distribution header at injection branch points while the header continues downstream; and primary process distribution header individual equipment supply branches where 2-1/2" IPS socket PVC supply assemblies connect perpendicularly to the 10" primary header and supply individual treatment process equipment; Schedule 40 PVC handles chemical service and primary header operating pressures at 2-1/2" socket branch locations in treatment environments where Schedule 40 satisfies the system material specification; NSF 61 listing confirms fitness for every 2-1/2" socket branch connection in the primary treatment distribution system
• HVAC & Large Commercial Mechanical Systems — Primary Distribution Main Fire Protection Supply Branches, Zone Supply Branches, Air Release Valve Supply Connections, Chemical Treatment Supply Branches, Drain Assembly Branches, and System Management Connections in Socket PVC Construction on 10" Schedule 40 Primary Distribution Mains — Installed at 2-1/2" IPS socket PVC branch assembly locations on 10" primary chilled water distribution mains, condenser water primary trunks, and large-capacity hydronic primary distribution mains in Schedule 40 PVC systems at large commercial campus, institutional, and industrial mechanical systems where the downstream branch assembly is in socket PVC construction and the primary main continues downstream — campus primary distribution main fire department connection and standpipe supply lateral branches where campus fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" campus primary distribution main while the primary distribution main continues downstream to supply additional campus buildings, service zones, and fire protection connections; campus primary chilled water distribution main zone supply branches where 2-1/2" IPS socket PVC zone supply assemblies connect perpendicularly to the 10" primary chilled water distribution main and supply individual campus buildings and mechanical room supply systems whose demands have been sized at 2-1/2" IPS supply capacity while the primary distribution main continues downstream to additional campus service branch locations; primary distribution main high-point air release valve supply branches where 2-1/2" IPS socket PVC combination air release valve supply assemblies connect perpendicularly to the 10" primary distribution main at high-point branch locations throughout the campus primary distribution network; primary distribution main drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary distribution main at low-point drain branch locations while the primary main continues downstream; primary distribution main chemical treatment supply branches where treatment chemical dosing assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary distribution main at chemical treatment branch points; primary distribution main blowoff assembly branches where 2-1/2" IPS socket PVC blowoff valve assemblies connect perpendicularly to the continuing 10" primary distribution main at major blowoff branch stations; and primary distribution main secondary circulation pump suction supply branches where 2-1/2" IPS socket PVC secondary pump suction supply assemblies connect perpendicularly to the continuing 10" primary distribution main through the 401-622's branch socket; Schedule 40 PVC construction satisfies the material specification at primary distribution main 2-1/2" socket branch locations in large commercial mechanical systems where Schedule 40 is the system material standard; at campus fire protection supply lateral branch locations, AHJ confirmation of branch orientation is required before run socket cement joints are made
• Aquaculture & Large-Scale Water Management Infrastructure — Specified at 2-1/2" IPS socket PVC branch assembly locations on 10" primary water supply, recirculation, or distribution mains at the largest commercial aquaculture facilities, regional hatchery systems, and large recirculating aquaculture systems (RAS) where the downstream branch assembly is in socket PVC construction and the primary main continues downstream — aquaculture facility fire protection supply lateral branches where the facility's fire protection supply laterals in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary supply distribution main through the 401-622's branch socket while the primary distribution main continues downstream; primary recirculation main zone supply branches where 2-1/2" IPS socket PVC zone supply assemblies connect perpendicularly to the 10" primary recirculation main and supply individual production halls and tank system supply headers whose demands have been hydraulically sized at 2-1/2" IPS while the primary recirculation main continues downstream to additional production section supply branch locations; primary supply main high-point combination air release and vacuum breaker valve supply branches where 2-1/2" IPS socket PVC combination air valve supply assemblies connect perpendicularly to the 10" primary supply main at high-point branch locations for pump startup air management while the primary main continues downstream; primary supply main chemical treatment supply branches where water quality treatment chemical injection assemblies in 2-1/2" IPS socket PVC construction connect perpendicularly to the 10" primary supply main at chemical dosing branch points while the primary main continues downstream; primary recirculation main drain assembly branches where 2-1/2" IPS socket PVC drain valve assemblies connect perpendicularly to the 10" primary recirculation main at low-point drain branch locations while the primary main continues downstream; and primary supply main secondary recirculation pump suction supply branches where 2-1/2" IPS socket PVC secondary and emergency recirculation pump suction supply assemblies connect perpendicularly to the continuing 10" primary recirculation main through the 401-622's branch socket; Schedule 40 PVC handles continuous water contact, treatment chemical exposure, and primary main operating pressures at 2-1/2" socket branch locations in commercial aquaculture infrastructure; NSF 61 listing confirms fitness for every 2-1/2" socket branch connection in the primary aquaculture distribution system