Reducing Tee, Slip x Slip x FPT PVC Schedule 40 4" x 4" x 3" (402-422)

The 402-422 is a PVC Schedule 40 reducing tee with a 4" slip (socket) run and a 3" 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 3" FPT branch provides a threaded takeoff point compatible with any standard 3" 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.

Unlike reducing tees with small-diameter instrumentation branches, the 402-422 features a 3" FPT branch — a substantial takeoff that accommodates high-flow valves, bypass circuits, pump suction and discharge connections, and large-diameter service lines branching off a 4" mainline. The modest one-inch reduction from run to branch means this fitting is well suited for systems where the branch must carry significant flow volumes, not merely serve as a gauge port or chemical injection tap. The threaded FPT branch delivers the additional advantage of serviceability — large valves, strainers, and inline equipment connected at the branch can be removed and replaced without disturbing the permanent solvent-welded mainline, a meaningful operational benefit in systems that require periodic maintenance or equipment upgrades at the branch connection point.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — High-flow branch takeoffs off 4" mainline headers for 3" zone valves, bypass circuits, pump station connections, and primary lateral supply lines in large-scale pressurized irrigation systems
• Municipal Water & Wastewater — High-volume service branches and bypass connections off 4" distribution mains at pump stations, treatment facilities, and water distribution networks where the branch must carry substantial flow
• Industrial Process Piping — Large-diameter threaded branch taps off 4" process fluid and cooling water mainlines for bypass loops, flow control valves, strainer assemblies, and primary service connections
• Commercial Plumbing — Mechanical room distribution headers where a 4" supply main requires a high-flow 3" threaded branch for major service circuits, equipment connections, or bypass assemblies
• Fire Suppression — Branch connections off 4" sprinkler system mains where a 3" threaded takeoff accommodates high-flow branch mains, riser connections, or system sectionalizing valves
• Aquaculture & Water Treatment — High-volume branch taps off large-diameter supply headers in recirculating aquaculture and water treatment systems where the branch circuit must support meaningful flow capacity