Wye, Slip x Slip x Slip PVC Schedule 40 1-1/2" (475-015)

This 1-1/2" Schedule 40 PVC Wye provides a 45° solvent-cemented branch outlet off a 1-1/2" PVC run, with all three slip socket ends accepting standard 1-1/2" PVC pipe for solvent cement joining. The two run ports maintain the straight-through flow path of the main, while the branch outlet exits the fitting body at a 45° angle to the run centerline — the defining geometric feature that distinguishes the wye from a standard 90° tee and determines its application across drain, waste, vent, and pressure piping systems.

The 45° branch angle is not a stylistic variation on the tee — it is a fundamentally different flow geometry that serves a different set of hydraulic requirements. Where a tee introduces the branch flow at a right angle to the run, creating an abrupt directional change at the branch entry point, the wye introduces the branch at a 45° oblique angle, allowing the branch flow to merge with or diverge from the run flow along a much smoother transition path. The practical consequences of this geometry are significant across the applications where wyes are specified.

In gravity drain, waste, and vent systems — the most common application for wyes at 1-1/2" — the 45° branch angle promotes self-scouring flow, reduces the likelihood of solids accumulation at the branch junction, and allows drain waste to enter the run with less turbulence and flow resistance than a 90° tee branch would produce. Horizontal-to-horizontal drain branch connections, floor drain takeoffs, sink drain branch points, and DWV lateral connections at the 1-1/2" size are all configurations where the wye's smooth branch entry angle is the preferred fitting over a standard tee. In these gravity flow applications, the wye's geometry actively supports the system's function by keeping waste moving through the branch junction rather than catching or slowing at an abrupt right-angle entry.

In pressure piping, the wye's reduced turbulence at the branch junction translates to lower pressure drop at the branch point compared to a tee — a consideration in systems where pressure efficiency at branch connections is a design priority. Where a standard tee is acceptable for most branch applications in pressure piping, the wye is the preferred specification wherever flow efficiency at the branch junction must be optimized: pump suction manifolds, recirculation loop branches, and instrument supply branches where pressure drop minimization at the branch fitting is specified.

Manufactured in white Schedule 40 PVC, this wye offers reliable performance across residential, commercial, and light industrial drain, DWV, and pressure piping applications. PVC's resistance to acids, bases, salts, chlorine, and common household and industrial drain fluids provides long service life in both gravity drain and pressure service environments. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact in pressure applications.

Rated to 330 psi at 73°F in pressure service, this fitting handles standard pressure requirements across irrigation, water distribution, and light process piping applications. For installation, clean and dry all pipe ends and socket interiors before application. Apply purple PVC primer to all mating surfaces — both run port sockets, the branch socket, and all three corresponding pipe ends. Apply a uniform coat of Schedule 40 PVC solvent cement to both the pipe end and socket interior at each of the three joints before inserting. Insert each pipe with a slight quarter-turn twist and hold firmly for 30 seconds to prevent pushback. Note the 45° branch orientation before cementing — the branch angle direction is set permanently at installation and determines the layout geometry of the branch run. Stagger the three joints where possible and allow full cure time per the cement manufacturer's temperature and humidity guidelines before pressurizing or placing in drain service. Apply published pressure derating factors for service temperatures above 73°F in pressure applications.

Specifications:

Industries & Applications:

• Drain, Waste & Vent (DWV) Systems — The primary application for the 1-1/2" Schedule 40 PVC wye: provides 45° branch connections at sink drain takeoffs, lavatory drain branches, floor drain laterals, horizontal-to-horizontal DWV branch points, and vent stack connections in residential and commercial building drain systems where the smooth 45° entry angle promotes self-scouring flow and reduces solids accumulation at the branch junction compared to a 90° tee branch
• Commercial Plumbing Drain Systems — Connects 1-1/2" PVC drain branch lines to horizontal drain runs in commercial building waste systems at laundry drain connections, janitor sink takeoffs, ice machine drain branches, and equipment drain piping where the wye's angled branch geometry is specified or preferred over a standard tee for improved drain flow characteristics
• Irrigation & Landscape Systems — Provides a 45° solvent-cemented branch outlet on 1-1/2" Schedule 40 PVC pressure mains and submains at diagonal zone takeoffs, angled lateral connections, and branch points where the 45° geometry suits the field layout better than a perpendicular tee branch or where reduced pressure drop at the branch junction is a design consideration
• Recirculation & Pump Systems — Used at pump suction manifold branch points, recirculation loop takeoffs, and parallel circuit splits in 1-1/2" Schedule 40 PVC pressure systems where the 45° branch geometry reduces turbulence and pressure drop at the branch junction compared to a standard 90° tee — a consideration in flow-sensitive pump suction and recirculation assemblies
• Pool, Spa & Aquaculture — Provides a 45° branch connection on 1-1/2" PVC recirculation, filtration return, and drain manifold piping at branch takeoffs, parallel circuit splits, and drain connection points in pool, spa, and aquatic facility installations where the wye's flow characteristics are preferred over a standard tee at manifold branch positions
• Light Industrial Process Piping — Installs at branch points on 1-1/2" Schedule 40 PVC process drain headers, equipment drain laterals, and gravity flow collection systems in light manufacturing and chemical processing facilities where drain branch connections benefit from the wye's 45° entry angle for improved flow and reduced solids trap risk at the branch junction
• Agricultural & Greenhouse Systems — Provides diagonal branch connections on 1-1/2" PVC gravity drain and pressure distribution manifolds at field drain takeoffs, greenhouse floor drain branches, and irrigation sub-main lateral connections where the 45° branch angle suits the field layout geometry or reduces pressure drop in pressure distribution applications