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The NIBCO 401-251 is a Schedule 40 PVC tee fitting designed for drain, waste, vent, and pressure piping systems in residential and commercial plumbing applications. It features three socket (S x S x S) connections sized at 2 inches by 2 inches by 1-1/2 inches, allowing a reduced branch takeoff from a main run. The fitting is molded from rigid PVC, which offers excellent resistance to corrosion and chemical attack in standard water service and low-pressure piping environments. Licensed plumbers and pipefitters are the primary installers of this fitting.
This tee is suited for cold and ambient-temperature water distribution, drain-waste-vent (DWV) assemblies, irrigation manifolds, and light industrial piping where Schedule 40 PVC is the specified material. The 1-1/2-inch branch outlet makes it a practical choice when reducing from a 2-inch main line to a smaller branch run, a common configuration in residential drain systems and commercial irrigation layouts. Sold as a single unit.
Designed as an OEM-style replacement or new-installation fitting for Schedule 40 PVC piping systems using 2-inch main-run pipe and a 1-1/2-inch branch connection.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the system before cutting into any existing piping. Use a PVC-rated primer and solvent cement applied to both the pipe end and socket bore, and allow full cure time before restoring flow or pressure. Do not use this fitting in systems carrying fluids or operating at temperatures outside the rated limits for Schedule 40 PVC.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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