Wye, Slip x Slip x Slip PVC Schedule 80 3" x 2-1/2" (875-339)

The 875-339 is a 3" x 2-1/2" Schedule 80 PVC reducing wye with slip socket connections on all three outlets. The fitting routes a 3" solvent-weld main run while introducing a 2-1/2" reduced branch at a 45° angle — the defining geometric characteristic that distinguishes a wye from a standard tee and makes it the preferred branch fitting in drain, waste, and vent (DWV) configurations, gravity-flow drainage systems, and any pressure application where smooth hydraulic transition at a branch junction is a design or code requirement.

The 45° branch entry reduces turbulence and head loss at the junction, supports self-cleaning flow characteristics by maintaining directional momentum through the branch transition, and minimizes the risk of solids accumulation that a sharp 90° tee branch can create — particularly relevant in industrial waste, chemical drain, and process effluent systems where the 875-339 is most commonly specified. The 2-1/2" branch size is a deliberate step-down from the 3" run, a pairing that appears frequently in industrial and commercial piping where a primary 3" drain or process line needs to accept a secondary branch from a 2-1/2" lateral without a full-capacity same-size junction.

The 2-1/2" nominal pipe size itself is worth noting for specifiers: while less common than 2" or 3" in general commercial plumbing, 2-1/2" is a recognized IPS schedule size with specific applications in industrial process piping, fire suppression systems, and specialty chemical handling where the intermediate flow capacity between 2" and 3" is a deliberate design choice. Pairing it with a 3" Schedule 80 wye run confirms this fitting's industrial and process piping orientation.

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 875-339 carries the full wall thickness and mechanical strength advantages of Schedule 80 construction — greater pressure capacity, enhanced chemical resistance, and superior impact tolerance compared to Schedule 40 equivalents — making it the correct specification in industrial environments where fittings face aggressive media, elevated system pressures, mechanical stress, or chemical exposure.

Specifications:

Industries & Applications:

• Industrial Drain, Waste & Vent (DWV) — Primary application for Schedule 80 reducing wyes; the 45° branch geometry meets code requirements for horizontal drain line branch connections while the Schedule 80 wall thickness handles chemical drain service, aggressive effluents, and mechanical conditions that Schedule 40 fittings are not rated for
• Chemical Processing & Manufacturing — Reducing branch junctions on 3" chemical drain headers, process waste lines, and rinse water collection systems where the 2-1/2" lateral feeds a secondary drain circuit; Schedule 80's chemical resistance handles a broad range of acids, bases, and industrial solvents
• Fire Suppression Systems — The 2-1/2" branch size is a recognized specification in fire suppression piping where intermediate-capacity branch connections off 3" supply mains are required; Schedule 80 construction provides the wall thickness and pressure rating appropriate for fire protection system service
• Industrial Process Piping — Low-to-moderate pressure reducing branch junctions on 3" process water, coolant, and utility fluid distribution systems requiring a 2-1/2" lateral takeoff with smooth hydraulic flow transition and Schedule 80 durability
• Pharmaceutical & Laboratory Facilities — High-purity drain and waste collection branch junctions where chemical-resistant Schedule 80 fittings are specified for aggressive effluent streams and the 45° wye geometry supports drainage system hygiene and code compliance
• Pulp, Paper & Food Processing — Gravity-drain and washdown system branch junctions handling dilute chemicals, brine, caustic wash water, and food-safe process effluents where Schedule 80 chemical resistance and wye flow geometry are both specification requirements
• Semiconductor & Electronics Manufacturing — Ultra-pure water and chemical waste distribution branch junctions where Schedule 80 PVC is specified for aggressive high-purity media and the reducing wye configuration accommodates different-diameter branch circuits within a process fluid system
• Mining & Power Generation — Process drainage, cooling water return, and chemical handling branch junctions in harsh industrial environments where Schedule 80 impact resistance, chemical tolerance, and pressure capacity outperform Schedule 40 in sustained heavy-duty service