Reduced Wye, Socket PVC Schedule 40 2" x 1-1/2" (475-251)

The 475-251 is a PVC Schedule 40 reduced wye fitting with a 2" socket run and a 1-1/2" socket branch outlet, all joined by solvent cement welding per ASTM D2564. The wye configuration positions the branch at an angled takeoff from the mainline — typically 45 degrees — rather than the perpendicular 90-degree branch of a standard tee. This geometry produces a smoother, lower-turbulence flow transition at the branch junction, reducing flow restriction and minimizing turbulence-induced pressure loss as fluid enters or exits the branch 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 drainage, waste, vent, and low-pressure distribution applications. The reduced wye configuration — 2" run reducing to a 1-1/2" branch — allows a smaller-diameter lateral or drain line to tie into a larger-diameter mainline at the branch, a common layout in DWV systems where multiple fixture drain lines consolidate into a primary drain stack or building sewer.

The wye fitting is the preferred branch fitting for gravity drain and DWV applications where smooth, unobstructed flow through the branch junction is essential to system performance. The angled branch geometry follows the natural direction of flow, reducing the likelihood of solids accumulation and blockage at the junction compared to a 90-degree tee branch — making the 475-251 well suited for sanitary drain lines, waste consolidation manifolds, and any gravity-flow system where drainage efficiency and long-term freedom from blockage are operational priorities. For applications requiring a direction change at the branch in addition to the lateral connection, a wye combined with a 45-degree elbow provides the standard DWV sweep configuration.

Specifications:

Industries & Applications:

• Drain, Waste & Vent (DWV) — Connecting 1-1/2" fixture drain lines — sinks, lavatories, floor drains, and appliance drains — to 2" sanitary drain stacks and waste consolidation lines with smooth, flow-friendly branch geometry
• Commercial Plumbing — Waste line consolidation in commercial buildings, restroom rough-in, and mechanical room drain manifolds where multiple smaller drain lines must tie into a larger primary drain with minimal flow restriction
• Residential Construction — Drain and waste rough-in where 1-1/2" fixture branch lines connect to 2" main drain runs in walls, floors, and crawl spaces
• Industrial Drainage — Low-turbulence branch connections in gravity-flow industrial drain and waste systems handling process water, equipment washdown effluent, and non-pressurized fluid waste
• Irrigation & Agriculture — Gravity-flow drainage and return line consolidation in irrigation tail-water recovery systems, greenhouse drainage manifolds, and agricultural waste water collection networks
• Municipal & Site Drainage — Branch connections in site storm drain and sanitary sewer lateral manifolds where reduced wye geometry supports clean flow transitions in gravity-flow collection systems