Tee, Slip x Slip x Slip PVC Schedule 40 4" (401-040)

The 401-040 is a 4" PVC Schedule 40 tee with three slip (socket) ports — a straight-through 4" run and a perpendicular 4" branch outlet — all joined by solvent cement welding per ASTM D2564. The uniform 4" diameter across all three ports creates a full-size, three-way junction in a single fitting, branching flow off a mainline at full pipe diameter with no reduction at the branch.

Manufactured from rigid PVC compound conforming to ASTM D1784 cell classification requirements, this tee 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 applications. The Schedule 40 wall thickness provides reliable pressure-rated performance for both pressurized distribution systems and gravity-flow installations, and the all-PVC construction resists corrosion, biological fouling, and a broad range of chemical media throughout its service life.

As one of the highest-velocity fittings in any large-diameter PVC catalog, the 4" Schedule 40 slip tee serves a central role in distribution system design wherever a 4" mainline must branch to a secondary run at full pipe diameter. The all-slip configuration produces three permanent solvent-welded joints — appropriate for installations where long-term, maintenance-free performance is the priority and branch connections will not require future disassembly. The full 4" branch diameter makes this tee the correct selection when the branch must carry flow volumes comparable to the mainline — parallel circuit feeds, equal-flow distribution headers, and bypass assemblies where flow splits evenly between the run and branch rather than being tapped at a reduced size. For applications where the branch carries less than full mainline flow, a reducing tee from the 401-4xx or 402-4xx series is the more appropriate selection, preserving mainline capacity while serving the branch at a correctly sized smaller diameter. For applications where the branch connection must remain serviceable — for valve replacement, equipment removal, or future system reconfiguration — a tee with an FPT branch outlet should be considered instead of this all-slip configuration.

Specifications:

Industries & Applications:

• Irrigation & Agriculture — Full-diameter three-way branch junctions in 4" mainline distribution headers and zone supply networks in large-scale pressurized irrigation systems where the branch must carry full mainline flow capacity to a parallel circuit or equal-flow lateral
• Municipal Water & Wastewater — Full-size branch junctions at pump stations, treatment facility distribution headers, and water main assemblies where a 4" mainline must branch at full diameter to a parallel supply main, bypass circuit, or secondary distribution trunk
• Fire Suppression — Three-way branch junctions in 4" fire suppression cross-mains, branch mains, and riser supply headers where a full-diameter branch is required to maintain system hydraulic performance and design flow rates across all circuits
• Industrial Process Piping — Full-diameter three-way junctions in cooling water loops, chemical distribution headers, and process fluid recirculation systems where parallel circuit feeds and equal-flow distribution require a full 4" branch capacity at the tee
• Commercial Plumbing — Mechanical room distribution manifolds and primary supply headers where a 4" mainline must branch at full diameter to serve major building circuits, equipment supply mains, or parallel distribution loops
• Aquaculture & Water Treatment — Full-diameter three-way junctions in large recirculating aquaculture and water treatment systems where a 4" supply main must branch at full capacity to parallel treatment circuits, tank supply headers, or primary distribution loops