Tee, Slip x Slip x FPT PVC Schedule 40 10" x 10" x 2 1/2" (402-622)

The 10" x 10" x 2-1/2" Schedule 40 White PVC Tee (402-622, Slip x Slip x FPT) is a large-diameter thermoplastic reducing tee fitting manufactured to ASTM D2466 in Schedule 40 white PVC — in which the two run connections are 10" IPS slip socket ends and the branch connection is a 2-1/2" FPT (Female Pipe Thread) end, providing a single-body Schedule 40 PVC solution for connecting a 2-1/2" male NPT threaded component directly to a 10" Schedule 40 PVC primary main at a perpendicular branch location without reducing the primary run diameter at the straight-run ports, without a separate threaded adapter between the tee body and the threaded component, without transitioning out of Schedule 40 white PVC construction at the primary main branch point, and without the permanently bonded socket branch connection of the Spears 401 series all-socket counterpart at the same size combination. The 402-622 is the correct fitting wherever a 10" Schedule 40 PVC primary main must receive a 2-1/2" male NPT threaded component connection at a perpendicular branch port — where the downstream branch component is inherently male NPT threaded at its primary main connection interface at the 2-1/2" nominal pipe thread size, where the 10" primary main must continue at full diameter through both straight-run ports downstream of the branch connection, 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" FPT branch accepts the downstream threaded component's 2-1/2" male NPT thread directly in the factory-formed internal female pipe thread of the tee's branch port. As the third configuration in the Spears 402 series at the 10" run service level — positioned between the 402-623's most broadly commercially active 3" FPT branch and the most commercially active mid-scale 2" FPT branch that the next smaller series configuration provides — the 402-622 serves the specific and commercially defined application niche where 2-1/2" male NPT is the required downstream component connection thread, most prominently in fire protection, standpipe supply, wet barrel hydrant supply, and specific pump and valve appurtenance applications where 2-1/2" NPT is the industry-standard connection interface at the primary main branch point.

The 402-622's position within the Spears 402 series at the 10" run level is defined by the 2-1/2" NPT thread's specific commercial character among the large-bore NPT thread sizes. Unlike the 3" NPT at the 402-623 — whose commercial breadth spans the widest range of primary main appurtenance component types across the most manufacturers and product lines in the large-bore commercial valve and appurtenance market — and unlike the 2" NPT of the next smaller configuration — whose commercial activity breadth at the mid-scale primary main service connection level is the widest of any NPT size in the Spears 402 series — the 2-1/2" NPT sits at a specific transitional position in the commercial NPT thread size range where its application prominence is defined by depth in particular application categories rather than breadth across many. The 2-1/2" NPT is the standard supply-side connection thread for the most commercially and institutionally consequential category of primary main appurtenance in the municipal water distribution, commercial building fire protection, and campus utility systems market: fire department connections, standpipe hose valve supply laterals, and wet barrel fire hydrant supply connections — the fire protection appurtenance assemblies whose 2-1/2" male NPT supply connection interface is governed by the same fire protection standards that define the 2-1/2" hose coupling as the standard fire hose connection size throughout the United States commercial and municipal fire protection market. At these fire protection applications, the 2-1/2" male NPT supply connection is not a variable or a matter of manufacturer catalog selection but a defined standard — the supply-side connection to the primary main is 2-1/2" male NPT by specification, and the primary main tee body that receives this supply connection must be the 402-622 with its 2-1/2" FPT branch, not the adjacent 402-623 with its 3" FPT branch and not the next smaller configuration with its 2" FPT branch. This standard-driven specificity at the 2-1/2" NPT fire protection connection interface is the foundation of the 402-622's commercial identity within the Spears 402 series at the 10" run level — the configuration that every 10" Schedule 40 PVC primary main project that includes a 2-1/2" male NPT fire protection or standpipe supply connection must include in its appurtenance tee BOM at each 2-1/2" NPT primary main branch location.

Beyond the fire protection application prominence, the 2-1/2" NPT thread also appears as the standard connection thread for specific pump configurations, specific valve body designs, and selected chemical injection and backwash supply assembly connections in the commercial pump station, water treatment, and large commercial irrigation markets where the equipment manufacturer has specified a 2-1/2" male NPT primary connection interface rather than the more common 3" male NPT or 2" male NPT sizes at adjacent configurations. In these non-fire-protection applications, the 402-622 serves the same role as the 402-623 and 402-624 at their respective NPT branch sizes — providing the FPT primary main tee body that accepts the downstream threaded component's male NPT connection without an adapter, without a transition nipple, and without leaving the Schedule 40 white PVC construction standard at the primary main branch point. The common thread across all 402-622 applications — fire protection and non-fire-protection alike — is the confirmation that the downstream component's male NPT thread is specifically 2-1/2" rather than 3" or 2", a confirmation that must be made from the downstream component's manufacturer specification before the 402-622 is purchased for installation at any 10" primary main branch point. In primary main systems where the appurtenance schedule includes 2-1/2" male NPT components alongside 3" male NPT and 4" male NPT components at different branch locations along the same 10" primary main route, the 402-622 appears in the project BOM alongside the 402-623 and 402-624 — each fitting purchased at the branch locations corresponding to its specific NPT thread size in the appurtenance schedule.

The most important specification comparisons at the 402-622 are the adjacency comparisons within the Spears 402 series at the 10" run level — the selection between the 402-622 (2-1/2" FPT at 25%), the 402-623 (3" FPT at 30%), and the next smaller configuration (2" FPT) at the 10" primary main branch point. Each of these three comparisons is governed by the downstream component's actual male NPT thread size and resolved by confirming that size from the manufacturer's specification before purchasing the tee body. The 402-623 is correct where the downstream component's male NPT thread is 3"; the 402-622 is correct where the downstream component's male NPT thread is 2-1/2"; the next smaller configuration is correct where the downstream component's male NPT thread is 2". At fire protection applications where the supply connection to a fire department connection assembly, standpipe hose valve supply body, or wet barrel hydrant supply is 2-1/2" male NPT by specification, the 402-622 is unambiguously correct regardless of the adjacent NPT sizes available in the series — the 2-1/2" NPT fire protection supply connection standard cannot be served by a 3" FPT tee without a reducing bushing adapter or by a 2" FPT tee without an enlarging adapter, and neither adapter approach is appropriate at a primary main fire protection supply branch where the connection must be direct from the tee body's FPT branch port to the fire protection component's male NPT thread in a single permanently engaged thread joint. At non-fire-protection applications where the downstream pump, valve, or appurtenance component carries a 2-1/2" male NPT connection thread by manufacturer design, the same confirmation logic applies — the 402-622 is correct because the downstream component's thread size is 2-1/2" male NPT, and the adjacent configurations in the Spears 402 series are incorrect at this branch location regardless of their broader commercial availability or lower unit cost.

The 2-1/2" branch at 25% of the 10" run diameter positions the 402-622 at a low-to-moderate lateral ratio in the Spears 401 and 402 series at the 10" run — below the 402-623's 30% moderate-to-low ratio, below the 402-624's 40% moderate ratio, and at a branch flow fraction that renders the 10" primary trunk increasingly hydraulically dominant at normal primary distribution flow conditions. At 25%, the 2-1/2" FPT branch carries a low-to-moderate fraction of the 10" primary run flow at design service conditions — a fraction whose effect on the 10" primary trunk's velocity, pressure, and flow profile during normal distribution operation when the branch component is closed or at standby is negligible at primary main design flow conditions, but whose contribution to the primary system's pressure budget at peak branch service events — most critically at fire flow demand events where the fire department connection or fire hydrant supply is at peak fire demand flow — is meaningful and must be addressed in the primary system's hydraulic analysis at design fire flow conditions. The fire flow demand scenario is the most hydraulically demanding branch service event at the 402-622 and requires the most rigorous hydraulic analysis of any branch service condition the fitting encounters: at full fire flow demand through the 2-1/2" branch port, the primary system engineer must confirm that the available pressure at the 402-622 branch location satisfies the fire protection system's minimum required supply pressure at the design fire flow demand rate, that the 2-1/2" branch's fire flow fraction does not reduce the 10" primary main's residual pressure below minimum requirements at the most remote simultaneous domestic and commercial service point downstream of the 402-622, and that the 10" primary main's available flow capacity at the fire demand location is adequate to supply both the fire flow demand through the branch and the simultaneous domestic demand on the primary main's continuing run. For non-fire-protection branch service applications — pump operation, chemical injection, backwash supply, and valve appurtenance service — the 25% low-to-moderate lateral ratio's hydraulic accounting requirement at the 402-622 is proportionally less demanding than at the fire flow scenario but must still be included in the primary system's hydraulic model at peak service event conditions.

The FPT branch type distinction — governing the selection between the 402-622 and its all-socket counterpart at the same 10" x 10" x 2-1/2" size combination — follows the same framework established uniformly across the complete Spears 402 series FPT branch tee documentation in this catalog and applies here at the 2-1/2" branch size with the same authority and rigor. The all-socket 10" x 10" x 2-1/2" counterpart in the Spears 401 series serves applications where the 2-1/2" downstream branch system is solvent cement socket PVC construction — where 2-1/2" IPS PVC pipe continues from the tee's branch socket through permanently bonded socket PVC fittings and appurtenances in the downstream branch assembly. The 402-622 serves applications where the 2-1/2" downstream branch component is inherently male NPT threaded at its primary main connection interface. At the 2-1/2" branch size, the socket-vs-FPT selection has particularly sharp practical significance in fire protection applications: fire department connection supply bodies and standpipe hose valve supply laterals that connect to the primary main through 2-1/2" male NPT threads are entirely male NPT at the primary main interface by design — there is no socket PVC equivalent for the fire department connection body's primary main supply connection at this size, and the 402-622's FPT branch is the only correct socket tee configuration for these fire protection supply connections at the 10" primary main branch level. Outside fire protection, buyers with a 2-1/2" socket PVC gate valve or socket PVC ball valve as the first component downstream of the primary main branch need the all-socket counterpart, not the 402-622; buyers whose first downstream component carries a 2-1/2" male NPT thread need the 402-622. This determination is made by inspecting the downstream component's connection interface type — socket PVC or male NPT — and is non-negotiable regardless of the application category.

The thread assembly discipline at the 402-622's 2-1/2" FPT branch port follows the same NPT thread assembly standards established across the complete Spears 402 series FPT branch tee documentation in this catalog and applied here at the 2-1/2" NPT thread engagement geometry. At the 2-1/2" FPT branch port, approved PTFE thread tape or an NPT-rated thread sealant compound compatible with Schedule 40 PVC and the conveyed fluid must be applied to the male threads of the 2-1/2" male NPT component before assembly — the thread sealant fills the helical NPT thread engagement clearance and prevents leakage at the pressure-energized thread joint under primary main operating conditions. The NPT taper thread's self-sealing geometry governs the engagement depth at the 2-1/2" NPT size — hand-tight engagement followed by the specified number of additional turns to achieve the required thread engagement depth and contact area; the correct number of turns past hand-tight for 2-1/2" NPT connections must be confirmed from the pipe thread engagement standard or the threaded component manufacturer's installation instructions. Thread assembly torque at 2-1/2" NPT on a PVC FPT branch port must be controlled with the same discipline established at the 3" and 4" FPT configurations in this catalog — over-torquing the 2-1/2" male NPT component's thread into the PVC FPT branch port applies the same wedging force from the NPT taper thread's engagement that risks cracking, splitting, or fracturing the PVC branch port body at the FPT thread form, and this fracture risk is present at 2-1/2" NPT with the same consequence as at 3" and 4" NPT on PVC FPT fittings — complete fitting body failure at the branch port requiring full primary main disassembly and tee replacement. The correct thread engagement depth must be achieved without exceeding the PVC material's thread engagement torque limits at the 2-1/2" NPT size; the assembly discipline is the same at every NPT size on PVC FPT fittings, and the slightly smaller thread engagement diameter at 2-1/2" relative to 3" does not reduce the consequence of over-torquing at this branch port size. Both 10" run socket connections require the complete large-diameter heavy-body solvent cement assembly discipline established for every 10" Schedule 40 socket fitting in this catalog — pre-planned assembly with both 10" 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, branch port orientation confirmation by dry-fit before cement is applied at either run socket, and full cure time compliance before any system pressurization. The 2-1/2" FPT branch port's 90-degree angular orientation relative to the 10" run axis is committed when the run socket cement joints are made — the downstream 2-1/2" male NPT component's spatial installation direction relative to the primary main is determined by the tee body's orientation in the primary main assembly; at fire protection applications where the fire department connection body's or standpipe supply lateral's installation direction is governed by fire protection system layout requirements, structural clearances, and access requirements for fire department operations, this orientation 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 402-622 body.

The schedule selection at the 402-622 follows the framework established across all 10" Schedule 40 specialty fitting pages in the 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 FPT branch appurtenance location. At fire protection supply applications specifically, the primary main's operating pressure at the fire flow demand condition — which may be significantly lower than the static system pressure due to the pressure drop from fire flow demand — must be included in the schedule selection analysis alongside the static and surge operating pressures to confirm that the Schedule 40 material class is appropriate at the 402-622's branch location under all anticipated primary system operating conditions. Where the system requires Schedule 80 wall thickness, gray material class identification, or the higher pressure ceiling that Schedule 80 provides at large-diameter FPT branch primary main fittings, the Schedule 80 counterpart at the 10" x 2-1/2" FPT 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 FPT branch appurtenance 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. The white color provides the Schedule 40 material class identification at the primary main threaded branch appurtenance location. The 2-1/2" FPT branch port's female thread form is machined or formed to the NPT standard thread geometry in the Schedule 40 PVC fitting body and is compatible with the full range of 2-1/2" male NPT threaded components in galvanized steel, bronze, brass, ductile iron, and PVC construction conforming to the NPT standard at the 2-1/2" nominal pipe size. Deburr and bevel both 10" run pipe ends before cementing to ensure consistent insertion depths and complete circumferential bond lines at both large-diameter run socket connections.

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 FPT branch tee for municipal water distribution primary mains supplying fire protection and appurtenance connections, 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 pump connection branch points. ASTM D2466 governs Schedule 40 PVC socket fittings and defines the manufacturing, dimensional, and pressure performance requirements the 402-622 is produced to. Verify manufacturer pressure rating documentation for the specific fitting configuration before final system specification — at the 10" x 2-1/2" FPT tee configuration, the governing pressure rating is determined by the 10" run port size and the fitting's tested performance at this FPT branch tee geometry, and must be confirmed against the manufacturer's published pressure-temperature rating table for SKU 402-622 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 (FPT); Spears 402 series Schedule 40 PVC FPT branch tee
• 2-1/2" FPT branch — female pipe thread branch port accepts 2-1/2" male NPT threaded components directly; no adapter, no transition nipple, no socket-to-NPT transition fitting required at the primary main branch point
• Third configuration in the Spears 402 series at the 10" run level — below the 402-623 (3" FPT at 30%) and above the next smaller 2" FPT configuration; the selection among adjacent Spears 402 configurations is determined exclusively by the downstream component's actual male NPT thread size — confirm from manufacturer specification before purchasing
• Fire protection application prominence — 2-1/2" NPT is the standard supply-side connection thread for fire department connections, standpipe hose valve supply laterals, and wet barrel fire hydrant supply connections in the US commercial fire protection market; the 402-622 is the correct and only appropriate tee body at primary main branch points where the downstream fire protection component's supply connection is 2-1/2" male NPT by specification
• 2-1/2" branch at 25% of 10" run diameter — low-to-moderate lateral ratio; 10" primary trunk hydraulically dominant at normal distribution flow; branch flow fraction meaningful at peak fire flow demand events and must be included in primary system hydraulic analysis at fire flow design conditions; fire flow demand is the most hydraulically demanding branch service event at this fitting
• Fire protection orientation requirement — branch port orientation at fire department connection and standpipe supply applications must be confirmed against the fire protection system layout drawing and AHJ installation requirements before run socket cement joints are made; orientation committed at cement application
• Most important specification distinction — 402-622 FPT where downstream 2-1/2" branch component is inherently male NPT threaded; all-socket counterpart where downstream 2-1/2" branch continues in socket PVC pipe and fitting construction; downstream component's connection interface type determines which series is correct
• FPT branch connection is detachable — 2-1/2" male NPT threaded components removable without cutting primary main or destroying tee body; appropriate for fire protection supply connections, pump connections, valve bodies, and appurtenances where maintenance or replacement is anticipated
• Thread sealant required at 2-1/2" FPT branch — PTFE thread tape or NPT-compatible thread sealant applied to male threads before assembly; thread engagement torque at 2-1/2" NPT on PVC FPT port must be controlled — over-torquing fractures the PVC branch port body; apply correct engagement depth without exceeding PVC material torque limits
• Branch port orientation fixed at run socket cement application — 2-1/2" FPT branch port's angular orientation committed when run socket cement joints are made; confirm against piping layout and fire protection or appurtenance installation requirements before cementing either run socket
• 402-622, 402-623, and 402-624 in same primary main BOM — primary main projects with 2-1/2", 3", and 4" male NPT components at different branch locations will require all three configurations in the project BOM
• Both 10" run socket connections require full large-diameter heavy-body cement assembly discipline; full cure time compliance before pressurization
• Schedule 40 vs. Schedule 80 selection: Schedule 40 correct where system pressure, surge, fire flow demand, and safety margin requirements fall within Schedule 40 pressure ceiling — verify against Schedule 80 counterpart before final specification
• 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; 2-1/2" FPT branch compatible with standard 2-1/2" male NPT threaded components in PVC, steel, bronze, brass, and ductile iron
• White color — standard Schedule 40 material class identification at the primary main threaded appurtenance branch location
• Cell classification PVC 12454 per ASTM D1784
• Heavy-body solvent cement at both 10" run sockets; PTFE tape or NPT thread sealant at 2-1/2" FPT branch; full cure time compliance mandatory before pressurization
• Pressure rating: verify against manufacturer pressure-temperature table for SKU 402-622

Specifications:

Industries & Applications:

• Municipal Water Distribution — Fire Department Connection Supply Laterals, Standpipe Supply Connections, Wet Barrel Hydrant Supply Connections, Blowoff Assemblies, and Primary Main Appurtenance Branch Points — The 10" x 10" x 2-1/2" Schedule 40 FPT branch tee is specified at 2-1/2" male NPT threaded fire protection supply and appurtenance connection points on 10" municipal water transmission and primary distribution mains in Schedule 40 PVC systems where the downstream branch component is inherently 2-1/2" male NPT threaded — fire department connection supply lateral connections where the 10" primary distribution main supplies a fire department connection (FDC) assembly whose underground supply lateral begins at a 2-1/2" male NPT primary main interface before transitioning to the supply lateral's pipe construction; the 402-622 providing the primary main FPT tee at the FDC supply entry point where the FDC supply body's 2-1/2" male NPT thread connects directly to the tee's FPT branch port at the primary main branch location; standpipe system supply lateral connections where a Class I or Class III standpipe system's primary water supply lateral connects to the 10" primary distribution main through a 2-1/2" male NPT primary main interface at the standpipe supply entry point; wet barrel fire hydrant supply connections in municipal water distribution systems where the wet barrel hydrant's underground supply is accessed through a 2-1/2" male NPT primary connection at the distribution main tee body — the 402-622 providing the primary main FPT tee at the hydrant supply branch location where the hydrant assembly's 2-1/2" male NPT supply thread connects directly to the branch port; primary transmission main blowoff assembly connections where the 10" primary transmission main requires a blowoff valve assembly with a 2-1/2" male NPT inlet at a low-point or end-of-main blowoff location — the 402-622 providing the FPT primary main tee where the 2-1/2" blowoff valve's male NPT inlet threads directly into the branch port; primary main high-point combination air release and vacuum breaker valve connections where the air release valve body carries a 2-1/2" male NPT inlet at high-point primary main appurtenance locations; primary main flushing assembly connections where 2-1/2" male NPT flushing valve bodies at primary main dead-end and distribution boundary locations serve commissioning flushing, water age management, and unidirectional flushing program functions at the 10" primary main level; and primary main drain assembly connections where drain valve bodies with 2-1/2" male NPT inlets connect to the 10" primary main at low-point drain structure locations; NSF 61 listing confirms potable water fitness at every municipal distribution primary main 2-1/2" FPT branch appurtenance connection; the hydraulic analysis at fire department connection and fire flow demand events must explicitly confirm that the 10" primary main's available pressure at the 402-622 branch location satisfies the fire protection system's minimum required supply pressure at the design fire flow demand rate while simultaneously satisfying the primary main's minimum residual pressure requirements at the most remote concurrent domestic service point
• Commercial and Institutional Fire Protection — Primary Supply Main 2-1/2" FPT Branch Connections for Fire Department Connection Supply, Standpipe Supply, and Fire Sprinkler System Riser Supply — Installed at 2-1/2" male NPT fire protection supply connection points on 10" primary water supply mains serving large commercial, institutional, and campus fire protection systems in Schedule 40 PVC systems where the primary water supply main is 10" Schedule 40 PVC and the fire protection supply connection's primary main interface is 2-1/2" male NPT by fire protection system design — primary supply main fire department connection supply lateral entries where the commercial building's or campus structure's fire department connection assembly supply lateral connects to the 10" primary supply main through a 2-1/2" male NPT primary main tee body — the 402-622 providing the FPT primary main tee at the FDC supply lateral entry point in the underground primary supply main where the FDC supply lateral's 2-1/2" male NPT connection threads directly into the branch port; primary supply main standpipe riser supply connections where the Class I or Class III standpipe system's primary water supply riser connection to the underground primary supply main is made through a 2-1/2" male NPT primary supply main interface — the 402-622 providing the FPT tee body at the standpipe supply riser entry point where the supply riser's 2-1/2" male NPT lower connection threads into the primary supply main's FPT branch port; campus fire protection grid primary supply main 2-1/2" male NPT appurtenance connections where the campus fire protection water supply grid requires fire department connection supply entries, standpipe supply laterals, and fire protection system test and drain connections along the 10" primary supply main route; fire protection system test header and main drain assembly connections where the test header assembly's primary supply connection carries a 2-1/2" male NPT thread for direct connection to the 10" primary supply main FPT tee body; and fire protection system isolation and sectional control valve supply connections where specific valve body configurations carry 2-1/2" male NPT primary supply main connection threads by fire protection system design; the fire protection system's minimum required supply pressure at maximum design flow demand must be confirmed against the 10" primary supply main's available pressure at the 402-622 branch location before the fitting is specified and the fire protection system design is finalized; the 402-622's orientation at fire protection supply connection locations must be confirmed against the fire protection system's layout drawing and the authority having jurisdiction's installation requirements before run socket cement joints are made
• Water Treatment Plant — Primary Header 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Valve Stations, Backwash Supply Connections, and Chemical Dosing Assembly Connections — Specified at 2-1/2" male NPT threaded appurtenance connection points on 10" primary distribution headers in municipal and industrial water treatment plants where the downstream branch component is inherently 2-1/2" male NPT threaded — filter gallery primary header drain assembly connections where the 10" primary header requires a drain valve assembly with a 2-1/2" male NPT inlet at a low-point header drain location; the 402-622 providing the FPT branch tee body at each drain assembly location where the drain valve's 2-1/2" male NPT inlet threads directly into the branch port; plant service water primary header high-point combination air release and vacuum breaker valve connections where air release valve bodies with 2-1/2" male NPT inlets are the specified component at high-point header locations throughout the treatment facility's service water distribution system; primary backwash supply header connections where backwash supply valve assemblies or backwash control valve supply connections carry 2-1/2" male NPT primary header connection threads at backwash system supply entry points along the 10" primary backwash supply header; clearwell supply primary header drain and flush connections where drain valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary supply header at low-point drain locations; primary chemical dosing distribution header connections where specific chemical injection assembly primary connections carry 2-1/2" male NPT threads at the 10" primary chemical distribution header injection points — coagulant injection assemblies, disinfection chemical supply assemblies, and pH adjustment chemical supply connections whose manufacturer-specified primary connection interface is 2-1/2" male NPT; and primary distribution header equipment supply connections where individual process equipment supply connections carry 2-1/2" male NPT threaded interfaces for direct connection to the 10" primary distribution header through the 402-622's FPT branch port; NSF 61 listing confirms potable water fitness at every water treatment plant primary header 2-1/2" FPT branch appurtenance connection
• Pump Station — Primary Header 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Valve Stations, Chemical Injection, and Specific Pump Supply Connections — Used at 2-1/2" male NPT threaded appurtenance connection points on 10" primary pump station suction and discharge headers where the downstream branch component is inherently 2-1/2" male NPT threaded — pump station primary discharge header drain assembly connections where the 10" primary discharge header requires a drain valve assembly with a 2-1/2" male NPT inlet at a low-point header drain location for primary header drainage during pump station maintenance isolation; pump station primary discharge header high-point combination air release valve connections where air release valve bodies with 2-1/2" male NPT inlets are the specified component at primary discharge header high-point appurtenance locations; pump station primary suction header drain assembly connections where drain valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary suction header at low-point drain locations for suction header drainage during pump station maintenance; pump station primary discharge header chemical injection assembly connections where treatment chemical dosing assemblies carry 2-1/2" male NPT primary discharge header connection interfaces at the 10" primary discharge header chemical injection point; standby and backup pump suction supply connections where specific pump unit configurations carry 2-1/2" male NPT suction inlet connection threads for direct supply from the 10" primary supply header through the 402-622's FPT branch port — the 402-622 providing the FPT primary main tee where the pump's 2-1/2" male NPT suction inlet threads directly into the branch port; pump station primary discharge header blowoff assembly connections where blowoff valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary discharge header at blowoff appurtenance locations; and pump station primary header pressure management valve connections where specific pressure sustaining valve, surge relief valve, or automatic control valve configurations carry 2-1/2" male NPT primary header connection interfaces at pressure management branch locations; at pump stations where primary headers operate at full system pressure including shut-off head and surge, Schedule 40 pressure ceiling confirmation at the 402-622 installation location is required before Schedule 40 material class is finalized
• Large Commercial & Agricultural Irrigation — Primary Transmission Main 2-1/2" FPT Branch Connections for Fire Protection Supply, Blowoff Assemblies, Air Release Valve Stations, and Chemical Injection Assemblies — Specified at 2-1/2" male NPT threaded appurtenance connection points 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 component is inherently 2-1/2" male NPT threaded — irrigation primary transmission main fire department connection supply lateral connections where golf course, resort campus, large commercial facility, or institutional campus fire protection supply laterals connect to the 10" irrigation primary transmission main through 2-1/2" male NPT primary main tee body connections — at irrigation systems that serve dual irrigation and fire protection supply functions, the 402-622 provides the primary main FPT tee at each FDC and fire protection supply lateral entry point along the transmission main; irrigation primary transmission main blowoff assembly connections where blowoff valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary transmission main at low-point and end-of-main blowoff locations; irrigation primary transmission main high-point combination air release and vacuum breaker valve connections where air release valve bodies with 2-1/2" male NPT inlets are specified at high-point primary transmission main appurtenance locations along routes traversing undulating terrain; irrigation pump station primary discharge header chemical injection assembly connections where fertilizer injection assemblies, soil amendment chemical supply connections, or pH adjustment chemical injection assemblies carry 2-1/2" male NPT primary discharge header connection interfaces at the irrigation pump station discharge injection points; irrigation primary transmission main standpipe supply connections where campus and institutional facilities served by the irrigation transmission main require standpipe system supply lateral connections with 2-1/2" male NPT primary main interfaces along the primary transmission route; and primary transmission main pressure management valve connections where specific pressure sustaining valve or pressure relief valve configurations carry 2-1/2" male NPT primary transmission main connection interfaces at pressure management appurtenance branch locations; at large commercial irrigation systems where primary transmission main operating pressures at pump station discharge proximity are at the higher end of the commercial primary main range, Schedule 40 pressure ceiling confirmation at the 402-622 installation locations near the pump station is required before Schedule 40 material class is finalized
• Industrial Process Piping — Primary Header 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Valve Stations, Specific Pump Connections, Chemical Treatment Supply, and Appurtenance Branch Points — Used at 2-1/2" male NPT threaded appurtenance connection points 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 component is inherently 2-1/2" male NPT threaded — process water primary header drain assembly connections where the 10" primary process water header requires drain valve assemblies with 2-1/2" male NPT inlets at low-point drain locations; cooling water primary distribution trunk drain and flush assembly connections where the 10" primary cooling water trunk requires drain valve assemblies with 2-1/2" male NPT inlets at low-point drain locations throughout the cooling water distribution network; plant utility water primary main high-point air release valve connections where combination air release valve bodies with 2-1/2" male NPT inlets are specified at primary utility water main high-point appurtenance locations; primary process water header chemical treatment injection assembly connections where corrosion inhibitor injection assemblies, biocide injection assemblies, and scale inhibitor supply connections carry 2-1/2" male NPT primary main connection interfaces at the 10" primary process water header chemical treatment injection points; standby and backup process pump suction supply connections where redundant pump units carry 2-1/2" male NPT suction inlet threads for direct supply from the 10" primary process water header through the 402-622's FPT branch port; primary header backwash supply connections where industrial filtration system backwash supply valve assemblies carry 2-1/2" male NPT primary supply connection interfaces at the 10" primary backwash supply header branch points; primary process header surge relief and pressure management valve connections where specific surge relief valve bodies or automatic control valve primary connections carry 2-1/2" male NPT primary header interfaces at pressure management appurtenance branch locations; and primary header blowoff and system drain connections where blowoff valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary process header at blowoff and system drainage appurtenance locations; Schedule 40 white PVC construction satisfies the material and pressure specification at 10" primary process header 2-1/2" FPT branch appurtenance locations where Schedule 40 is the system material standard
• Municipal Well Field — Primary Collection and Distribution Header 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Stations, Chemical Injection, and Appurtenance Branch Points — Installed at 2-1/2" male NPT threaded appurtenance connection points on 10" primary well field collection or distribution headers where the downstream branch component is inherently 2-1/2" male NPT threaded — primary collection header drain assembly connections where the 10" primary collection header requires drain valve assemblies with 2-1/2" male NPT inlets at low-point drain locations for primary collection header maintenance drainage; primary distribution header high-point combination air release and vacuum breaker valve connections where air release valve bodies with 2-1/2" male NPT inlets are specified at well field primary distribution header high-point appurtenance locations; pump station primary discharge header chemical treatment injection assembly connections where water treatment chemical injection assemblies — chlorination supply, pH adjustment chemical supply, or corrosion inhibitor injection assemblies — carry 2-1/2" male NPT primary distribution header connection interfaces at the chemical injection branch points; primary distribution header pressure management valve connections where specific pressure sustaining valve or pressure relief valve configurations carry 2-1/2" male NPT primary distribution header connection interfaces at pressure management branch locations; primary distribution header fire department connection supply lateral entries where well field distribution headers supply commercial or institutional fire protection systems through 2-1/2" male NPT FDC supply lateral connections at the primary distribution header; and primary collection and distribution header blowoff and flushing assembly connections where blowoff valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary header at blowoff appurtenance locations for system flushing, water age management, and header maintenance drainage; at well field primary headers where operating pressures including shut-off head and surge must be confirmed within the Schedule 40 pressure ceiling, the schedule selection requires explicit confirmation for each 402-622 installation location
• Water & Wastewater Treatment — Primary Process Header 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Stations, Chemical Dosing, Backwash Supply, and Equipment Connections — Specified at 2-1/2" male NPT threaded appurtenance connection points on 10" primary process distribution headers in industrial wastewater treatment, water reclamation, and large-scale industrial water management facilities where the downstream branch component is inherently 2-1/2" male NPT threaded — primary influent header drain assembly connections where the 10" primary influent header requires drain valve assemblies with 2-1/2" male NPT inlets at primary header drain locations; primary effluent distribution header high-point air release valve connections where combination air release valve bodies with 2-1/2" male NPT inlets are specified at primary effluent header high-point appurtenance locations; primary chemical distribution header blowoff and flush valve connections where blowoff valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary chemical header at header terminus and boundary drain locations; aeration system primary supply header drain and flush connections where drain valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary aeration supply header at drain appurtenance locations; primary disinfection header chemical injection assembly connections where specific disinfection chemical dosing assembly configurations carry 2-1/2" male NPT primary main connection interfaces at the 10" primary disinfection header chemical dosing points; primary process distribution header backwash supply connections where backwash control valve supply assemblies carry 2-1/2" male NPT primary supply connection interfaces at the 10" primary backwash supply header branch points; primary sludge handling header drain and flush connections where drain valve assemblies with 2-1/2" male NPT inlets connect to the 10" primary sludge header at drain appurtenance locations for system maintenance and process isolation; and primary process distribution header major equipment supply connections where specific treatment equipment supply connections carry 2-1/2" male NPT threaded interfaces for direct connection to the 10" primary distribution header through the 402-622's FPT branch port; Schedule 40 PVC handles chemical service and primary header operating pressures at 2-1/2" FPT branch appurtenance connections in treatment environments where Schedule 40 satisfies the system material specification; NSF 61 listing confirms fitness at every 2-1/2" FPT branch appurtenance connection in the primary treatment distribution system
• HVAC & Large Commercial Mechanical Systems — Primary Distribution Main 2-1/2" FPT Branch Connections for Drain Assemblies, Air Release Stations, Fire Protection Supply, and Chemical Treatment Connections — Used at 2-1/2" male NPT threaded appurtenance connection points on 10" primary chilled water distribution mains, condenser water primary trunks, and large-capacity hydronic heating and cooling primary distribution headers in Schedule 40 PVC systems where the downstream branch component is inherently 2-1/2" male NPT threaded — campus primary distribution main fire department connection supply lateral entries where the campus fire protection system's FDC supply laterals connect to the 10" primary chilled or domestic water distribution main through 2-1/2" male NPT primary main FPT tee body connections along the campus underground primary distribution route; primary distribution main low-point drain assembly connections where the 10" primary distribution main requires drain valve assemblies with 2-1/2" male NPT inlets at the lowest points of the underground campus primary distribution network for system shutdown drainage and maintenance access; primary condenser water distribution trunk high-point air release valve connections where combination air release valve bodies with 2-1/2" male NPT inlets are specified at primary condenser water trunk high-point appurtenance locations; primary distribution main chemical treatment injection assembly connections where cooling tower water treatment chemical dosing assemblies carry 2-1/2" male NPT primary distribution main connection interfaces at the 10" primary main chemical treatment injection points; primary distribution main standpipe system supply lateral connections where institutional or commercial building standpipe riser supply laterals connect to the 10" primary supply distribution main through 2-1/2" male NPT primary main FPT tee body connections; and primary distribution main pressure management valve connections where specific differential pressure control valve, pressure sustaining valve, or automatic pressure management valve configurations carry 2-1/2" male NPT primary distribution main connection interfaces at pressure management appurtenance branch locations; fire department connection and standpipe supply branch orientation must be confirmed against the campus fire protection system layout and AHJ installation requirements before run socket cement joints are made at the 402-622 fitting; Schedule 40 PVC construction satisfies the material specification where Schedule 40 is the system material standard
• Aquaculture & Large-Scale Water Management Infrastructure — Installed at 2-1/2" male NPT threaded appurtenance connection points on 10" primary water supply, recirculation, or distribution headers at the largest commercial aquaculture facilities, regional hatchery systems, and large recirculating aquaculture systems (RAS) where the downstream branch component is inherently 2-1/2" male NPT threaded — primary recirculation header drain assembly connections where the 10" primary recirculation header requires drain valve assemblies with 2-1/2" male NPT inlets at low-point system drain locations for recirculation system volume management and maintenance drainage; primary supply header high-point combination air release and vacuum breaker valve connections where air release valve bodies with 2-1/2" male NPT inlets are specified at primary supply and recirculation header high-point appurtenance locations for pump startup air management; primary supply header chemical treatment injection assembly connections where water quality treatment chemical injection assemblies — sodium bicarbonate supply, carbon dioxide injection assemblies, salt solution supply connections, or proprietary water conditioner injection assemblies — carry 2-1/2" male NPT primary supply header connection interfaces at the 10" primary supply header chemical dosing points; standby and emergency recirculation pump suction supply connections where backup recirculation pump configurations carry 2-1/2" male NPT suction inlet connection threads for direct supply from the 10" primary recirculation header through the 402-622's FPT branch port; primary distribution header fire protection supply lateral connections at large aquaculture facility building entry and fire protection system supply points where facility fire protection FDC supply laterals connect to the 10" primary supply distribution main through 2-1/2" male NPT primary main FPT tee body connections; primary supply header backwash and filter cleaning supply connections where filtration system backwash supply valve assemblies carry 2-1/2" male NPT primary supply connection interfaces at the 10" primary supply header backwash branch points; and primary distribution header pressure management connections where specific pressure sustaining valve or pressure relief valve configurations carry 2-1/2" male NPT primary distribution header connection interfaces at pressure management branch points; Schedule 40 PVC handles continuous water contact and treatment chemical exposure at primary header 2-1/2" FPT branch appurtenance connections in commercial aquaculture infrastructure; NSF 61 listing confirms fitness at every 2-1/2" FPT branch appurtenance connection in the primary aquaculture distribution system