Reducing Tee, Slip x Slip x FPT PVC Schedule 40 4" x 4" x 1-1/2" (402-419)

The 402-419 is a PVC Schedule 40 reducing tee with a 4" slip (socket) run and a 1-1/2" female pipe thread (FPT) branch outlet. The two 4" run ports accept solvent cement welding per ASTM D2564 for a permanent, pressure-rated inline connection, while the 1-1/2" FPT branch provides a threaded takeoff point compatible with any standard 1-1/2" NPT male-threaded fitting, valve, pump connection, or equipment port — no solvent welding required at the branch.

Manufactured from rigid PVC compound conforming to ASTM D1784 cell classification requirements, this fitting delivers the corrosion resistance, chemical compatibility, and long service life associated with Schedule 40 PVC across a wide range of commercial, industrial, and municipal piping systems. The Schedule 40 wall thickness provides reliable pressure-rated performance for both pressurized distribution systems and gravity-flow applications.

The 402-419 holds a well-defined position at the upper end of the small-to-mid branch range within the 4" x 4" FPT reducing tee series. The 1-1/2" FPT branch is one of the most common pipe sizes in commercial and industrial plumbing, supporting a wide range of valve bodies, strainer assemblies, pump connections, and inline equipment — making this fitting a natural fit for systems where the branch must handle genuine moderate flow demand rather than a simple service tap or instrumentation port. The 1-1/2" branch represents a meaningful step up in flow capacity from the 1-1/4" branch of the 402-418 while remaining a clearly subordinate takeoff from the 4" mainline, preserving mainline throughput while delivering a capable branch circuit. PTFE thread tape or appropriate thread sealant should be applied to male threads before assembly at the FPT outlet. The threaded branch remains fully serviceable — valves, strainers, meters, and other inline branch components can be removed and replaced without disturbing the permanent solvent-welded mainline, a practical advantage in systems where branch equipment requires routine maintenance or periodic replacement.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — Moderate-to-high flow zone valve connections and bypass taps off 4" mainline headers in large-scale pressurized irrigation systems where a 1-1/2" branch serves a primary lateral or zone circuit requiring meaningful flow capacity
• Municipal Water & Wastewater — Moderate-flow service branches, bypass connections, and secondary feed taps off 4" distribution mains at pump stations and treatment facilities where a 1-1/2" threaded branch accommodates valves, meters, or secondary supply lines
• Industrial Process Piping — Threaded branch taps off 4" process fluid and cooling water mainlines for bypass loops, chemical feed assemblies, strainer installations, and moderate-flow service connections requiring a serviceable threaded joint
• Commercial Plumbing — Mechanical room distribution headers where a 4" supply main requires a 1-1/2" threaded branch for dedicated equipment feeds, hose station supply lines, secondary service circuits, or drain and bypass connections
• Fire Suppression — Auxiliary drain valves, inspector test connections, and pressure relief assemblies off 4" sprinkler system mains where a 1-1/2" threaded branch provides the flow capacity required for system drain-down and testing procedures
• Aquaculture & Water Treatment — Moderate-flow branch taps and secondary circuit feeds off large-diameter supply headers in recirculating aquaculture and water treatment systems where the branch must support dedicated zone or treatment circuit flow