Reducing Tee, Slip x Slip x Slip PVC Schedule 40 4" x 4" x 3" (401-422)

The 401-422 is a PVC Schedule 40 reducing tee with a 4" slip (socket) run and a 3" slip (socket) branch outlet, all joined by solvent cement welding per ASTM D2564. The two 4" run ports accept standard 4" PVC pipe ends for a permanent, pressure-rated inline connection, while the 3" slip branch accepts a standard 3" PVC pipe end — creating a fully solvent-welded, three-way reducing junction with no threaded connections at any port.

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 401-422 is the all-slip counterpart to the 402-422 (4" x 4" x 3" FPT branch) and carries the same application context with a fundamentally different end-type character: all three ports are permanent solvent-welded connections, producing a fully bonded three-way junction with no threaded interfaces at any port. This makes the 401-422 the correct choice when a high-flow 3" branch is a permanent, fixed installation — a primary lateral supply line, a bypass circuit, a pump station branch header, or a major secondary distribution main that will never require removal, disconnection, or reconfiguration at the branch joint. The 3" branch is the largest outlet size in the 4" all-slip reducing tee series and carries the highest flow capacity of any branch in the 401-4xx family — at only a one-inch reduction from the 4" run, the branch is a near-primary-flow path rather than a subordinate tap, making this fitting appropriate for systems where the branch must handle substantial, sustained flow volume as a primary circuit rather than a secondary or service connection. Buyers who need the branch connection to remain serviceable — for future valve replacement, equipment removal, or system reconfiguration — should select the 402-422 (FPT branch) instead, which provides an identical run configuration with a threaded branch outlet that can be disconnected without cutting pipe.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — Permanent high-flow 3" branch connections off 4" mainline headers for primary lateral supply lines, zone sector headers, and fixed bypass circuits in large-scale pressurized irrigation systems where the branch is a permanent primary flow path requiring no future serviceability
• Municipal Water & Wastewater — Permanent high-capacity branch connections off 4" distribution mains at pump stations, treatment facility headers, and water distribution system assemblies where a 3" branch carries substantial sustained flow to a secondary distribution main or service circuit
• Industrial Process Piping — Permanent three-way junctions in chemical distribution, cooling water, and process fluid systems where a 4" mainline must branch to a 3" primary distribution or bypass line in a fully solvent-welded system with no threaded interfaces
• Commercial Plumbing — Mechanical room distribution manifolds where a 4" supply header must permanently branch to a 3" primary service circuit, equipment supply main, or bypass assembly in an all-solvent-weld piping system
• Fire Suppression — Permanent high-flow branch connections off 4" sprinkler system mains where a 3" branch supplies a major circuit, riser connection, or system sectionalizing assembly as a fixed, fully bonded installation
• Aquaculture & Water Treatment — Permanent high-capacity three-way junctions in large recirculating aquaculture and water treatment systems where a 4" supply main must permanently branch to a 3" primary circuit header or treatment loop supply line