Mueller Industries, Inc. 1WKJ9 PVC Trap Adapter 4 in x 3 in

4 in x 3 in PVC Hub Adapter

This PVC hub adapter connects a 4 in pipe to a 3 in pipe using a spigot by hub configuration. It is designed for gravity flow drainage systems in residential or commercial plumbing installations. The Schedule 40 construction provides standard wall thickness for typical drain waste and vent applications. Plumbers and contractors use it when transitioning between different pipe diameters.

White Schedule 40 PVC Construction

The white PVC material resists corrosion and chemical degradation common in drainage environments. Schedule 40 rating indicates the wall thickness suitable for standard gravity flow pressure requirements. The socket and spigot ends allow solvent weld connections without additional seal components. The adapter operates reliably between -20 degrees and 140 degrees Fahrenheit.

Reduces 4 in to 3 in Diameter

This fitting handles the transition from a 4 1/2 in outside diameter pipe down to a 3 1/2 in outside diameter pipe. The overall length measures 5 3/4 in, providing sufficient insertion depth for secure solvent welded joints. It suits gravity flow systems only and is not rated for pressurised applications beyond that scope. Builders needing larger reductions or pressure rated fittings must select different components.