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The OATEY 48WK is a 1-1/2 inch white polypropylene 3-way coupling tee designed for slip joint tubular drainage connections in residential under-sink applications. This fitting joins a 1-1/2 inch tube to a 1-1/2 inch wall or floor drain connection, making it well suited for completing P-trap and drain arm assemblies. The polypropylene construction resists corrosion and common drain chemicals. A heavy-duty slip joint washer is included to create a leak-resistant seal at each connection point. Plumbers and experienced DIYers will find the slip joint design straightforward to assemble without adhesives or special tooling.
This coupling tee is intended for under-sink drain configurations in kitchens and bathrooms where tubular drainage components connect to wall or floor waste outlets. Typical installations include single and double-bowl kitchen sink drain assemblies, lavatory drain arms, and similar low-pressure gravity drainage setups. It is not rated for pressurized supply lines. The white finish blends with standard white tubular drain components commonly found in residential cabinetry.
Designed as an OEM-style slip joint fitting for standard 1-1/2 inch residential tubular drainage systems, including P-trap assemblies and drain arm connections at wall or floor outlets.
Installation is typically performed by a licensed plumber or qualified DIYer familiar with tubular drain systems. Shut off the water supply and clear standing water from the trap before disassembling existing drain components. Hand-tighten slip joint nuts to seat the washer, then snug slightly with slip-joint pliers — over-tightening polypropylene fittings can crack the nut. Verify all joints are leak-free by running water and inspecting connections before closing the cabinet.
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