Wye, Slip x Slip x Slip PVC Schedule 40 4" (475-040)

The 4" PVC Schedule 40 Wye (475-040) is a full-size, same-diameter wye fitting designed for drainage, waste, and vent (DWV) systems where a 4" branch line must merge into or divert from a 4" main run with minimal flow disruption. The 45° branch angle allows flow to enter or exit the main run gradually — reducing turbulence, limiting solids accumulation at the junction, and promoting consistent, unimpeded flow through the fitting compared to the sharp 90° branch geometry of a standard tee.

All three ports use slip connections for permanent, solvent-welded joints that deliver a clean, leak-resistant assembly suited to both above-ground and below-grade drainage installations. At 4" on all three ports, this is a full-size wye with no diameter reduction at the branch — well suited to systems where the branch line carries equal or near-equal flow volume to the main run, or where two 4" lines must converge into a single 4" primary drain without a size transition at the junction.

Manufactured from rigid PVC to Schedule 40 specifications and dimensionally compliant with ASTM D2466, the 475-040 integrates cleanly with Schedule 40 pipe and fittings from all major manufacturers across all three ports. NSF 61 certification confirms suitability for potable water contact where applicable, and the fitting is well established in commercial DWV, industrial drainage, and gravity-fed waste collection applications where the 45° branch geometry is specified over a tee for flow performance and long-term reliability.

At 4" diameter, this wye is a workhorse fitting in commercial plumbing rough-in, industrial floor drain collection, and large-scale drainage system design — sized for the primary drain and waste lines that anchor multi-fixture commercial plumbing layouts and high-volume industrial drainage networks.

Specifications:

Industries & Applications:

• Commercial Plumbing & DWV — primary drain and waste line branch connections in commercial rough-in where a full-size 45° wye is specified over a tee for improved flow performance and reduced solids buildup risk
• Industrial Drainage — process floor drain and equipment waste collection branch junctions where two 4" waste lines converge into a primary drain header
• Municipal & Civil — below-grade drainage lateral connections to primary collection lines in municipal infrastructure and site drainage systems
• Food & Beverage Processing — sanitary waste and floor drain collection systems requiring reliable, low-turbulence flow paths at full 4" branch junctions
• Hospitality & Institutional — multi-fixture group drain branches and stack connections in hotels, hospitals, schools, and large commercial facilities
• Irrigation & Agriculture — gravity-fed drainage and runoff collection systems requiring full-size 4" branch junctions at collection manifolds or diversion points