Tee, Slip x Slip x FPT PVC Schedule 40 8" x 8" x 4" (402-582)

The 8" x 8" x 4" PVC Schedule 40 Tee (402-582) combines solvent-weld slip connections on the 8" run ports with a 4" female pipe thread (FPT) branch outlet — delivering the permanence of a solvent-welded main line connection alongside the installation flexibility of a threaded branch takeoff in a single, large-diameter fitting. This hybrid slip x slip x FPT configuration eliminates the need for a separate threaded adapter at the branch, reducing the total fitting count at the junction, minimizing potential leak points, and streamlining the installation wherever a serviceable or removable branch connection is preferred over a permanently cemented one.

At 8" run and 4" branch, the 402-582 occupies a critical size position in large-diameter PVC piping systems — the 8" run handles high-volume mainline flow while the 4" FPT branch is large enough to serve as a primary feed to a valve station, sub-distribution header, metering assembly, or major instrumentation connection. The female pipe thread on the branch accepts any standard NPT-threaded male fitting, making this tee particularly practical for applications requiring periodic branch service, throttling valve access, or future branch modifications without disturbing the solvent-welded main line.

Manufactured from white PVC compound meeting ASTM D2466 dimensional standards, the 402-582 delivers the full corrosion resistance, chemical inertness, and long-term durability that make Schedule 40 PVC the material of choice for large-bore water distribution, irrigation infrastructure, and industrial process piping. The Schedule 40 pressure rating suits the complete range of low-to-medium pressure operating conditions where 8" PVC mains are most commonly deployed.

Specifications:

Apply PTFE tape or pipe thread sealant to male NPT threads before assembly on the FPT branch. Do not overtighten threaded connections — hand-tight plus one to two turns is standard for PVC NPT joints. Heavy-bodied solvent cement is recommended for 8" slip socket joints. Allow full cure time before pressurizing. Pressure-temperature derating applies at elevated service temperatures per ASTM standards.

Industries & Applications:

• Municipal Water Distribution — 8" transmission and primary distribution mains requiring a 4" threaded branch takeoff for service valves, blow-off assemblies, pressure relief connections, or hydrant lateral feeds where future valve service access is required
• Agricultural & Large-Scale Irrigation — 8" mainline trunk distribution with a 4" threaded branch drop to zone valve stations, filter manifold inlets, fertigation injection assemblies, or pump bypass connections on large farms, golf courses, and managed landscapes
• Industrial Process Piping — High-volume fluid transfer headers requiring a 4" threaded branch for flow meters, pressure gauges, chemical injection ports, or bypass loop connections where the threaded interface supports periodic disconnection or instrument replacement
• Water & Wastewater Treatment — Plant distribution headers supplying 4" threaded branch connections to chemical dosing skids, sampling stations, pressure monitoring ports, or secondary treatment process inlets
• Fire Protection Supply Systems — Underground or above-grade 8" supply mains with a 4" threaded branch feed to auxiliary suppression risers, standpipe connections, or dedicated fire storage fill lines requiring a serviceable branch interface
• Stormwater & Flood Control Infrastructure — Large-diameter collection or conveyance systems with a 4" threaded branch connection for monitoring instrumentation, flow control valves, or cleanout access points
• Commercial HVAC & Chilled Water Systems — 8" chilled water or condenser water distribution mains with a 4" threaded branch drop to mechanical room equipment, heat exchanger connections, or chemical treatment injection points
• Aquaculture & Water Management — High-flow recirculation or intake headers requiring a 4" threaded branch connection for flow control valves, aeration inlets, monitoring equipment, or treatment system bypass feeds