Wye, Slip x Slip x Slip, PVC Schedule 80 3" x 1-1/2" (875-337)

The 875-337 is a 3" x 1-1/2" Schedule 80 PVC reducing wye with slip socket connections on all three outlets. The fitting carries a 3" solvent-weld main run while introducing a 1-1/2" reduced branch at a 45° angle — the geometry that defines a wye, satisfies horizontal drain line branch connection code requirements, and delivers measurably better hydraulic performance at the junction than a standard 90° tee branch in drain, waste, and vent (DWV) applications, gravity-flow drainage systems, and industrial process piping where low-turbulence flow transition is a design priority.

The 1-1/2" branch represents the smallest step-down in this three-fitting Schedule 80 reducing wye series alongside the 875-338 (3"×2") and 875-339 (3"×2-1/2"). At a full 1-1/2" nominal size below the 3" run, this branch outlet is purpose-sized for secondary drain circuits, cleanout laterals, small equipment drain connections, condensate returns, low-flow bypass loops, and chemical injection or sampling ports that require the hydraulic advantage of the wye geometry but do not demand the larger branch capacity of the 2" or 2-1/2" variants. The 1-1/2" socket is large enough for full-bore Schedule 80 fittings and pipe — including ball valves, unions, and elbows — while keeping the branch circuit right-sized for its function.

This size pairing is a recognized configuration in industrial facility drain systems, laboratory waste collection networks, and chemical process plants where a 3" primary drain or waste header services multiple branch points, some of which connect relatively low-flow secondary equipment drains, floor drain returns, or condensate lines at 1-1/2". Using a reducing wye rather than a reducing tee at these branch points keeps the system compliant, maintains flow momentum through the junction, and reduces the likelihood of solids accumulation — a relevant concern in chemical and industrial waste streams where particulate-laden or viscous effluents pass through the fitting.

All three slip sockets accept standard IPS-dimension Schedule 80 PVC pipe bonded with IPS-approved PVC solvent cement. Manufactured from rigid dark gray PVC compound to ASTM D2467, the 875-337 provides the full Schedule 80 performance advantage: heavier walls, higher pressure ratings, superior chemical resistance across acids, bases, and industrial solvents, and greater impact and mechanical stress tolerance than Schedule 40 equivalents — confirming its specification role in industrial, chemical, and demanding commercial service environments.

Specifications:

Industries & Applications:

• Industrial Drain, Waste & Vent (DWV) — Secondary equipment drain, floor drain return, and low-flow lateral connections off 3" industrial drain headers; the 45° wye branch satisfies horizontal drain line code requirements while the Schedule 80 wall thickness handles chemical drain service and aggressive industrial effluents that disqualify Schedule 40 in heavy-duty environments
• Chemical Processing & Manufacturing — Low-flow secondary branch connections on 3" chemical drain headers and process waste collection mains; the 1-1/2" branch accommodates condensate returns, chemical feed drain lines, small equipment drain ports, and secondary waste circuits where full 2" or 3" branch capacity is not required
• Laboratory & Research Facilities — Chemical waste drain branch junctions in laboratory drain systems where 1-1/2" secondary equipment drains, sink drains, or hood drain lines connect into a 3" Schedule 80 waste collection header; Schedule 80 chemical resistance handles solvent waste, acid drain, and mixed laboratory effluent streams
• Pharmaceutical & Biotech Facilities — Process drain and pure water system branch junctions where Schedule 80 PVC is specified for aggressive effluent streams and the reducing wye configuration accommodates 1-1/2" secondary drain circuits off a 3" primary waste or process line
• Industrial Process Piping — Low-flow bypass loops, condensate return lines, sampling ports, and secondary equipment connections branching off 3" Schedule 80 process water, coolant, and utility fluid distribution headers where the wye geometry supports smooth hydraulic transition and Schedule 80 construction meets industrial service requirements
• Semiconductor & Electronics Manufacturing — Chemical waste and ultra-pure water distribution branch junctions where Schedule 80 PVC is specified for aggressive high-purity and corrosive media and the 1-1/2" branch accommodates secondary process circuits, drain connections, or rinse water return lines off a 3" primary header
• Pulp, Paper & Food Processing — Low-flow gravity-drain and condensate return branch junctions on 3" washdown and waste collection headers handling dilute chemicals, caustic solutions, brine, and food-safe process effluents in facilities where Schedule 80 chemical resistance and wye flow geometry are both specification requirements
• HVAC & Mechanical Systems — Condensate drain and low-flow return branch connections on 3" Schedule 80 mechanical system drain headers in industrial and commercial buildings where corrosion-resistant heavy-wall fittings are specified for long-term service reliability