Reduced Wye, Socket PVC Schedule 40 3" x 1-1/4" (475-336)

The 3" x 1-1/4" PVC Schedule 40 Reduced Wye (Socket) provides a smooth, angled branch connection off a 3" solvent-welded drain or gravity-flow run, accepting a 1-1/4" pipe at the branch port. The wye geometry orients the branch at approximately 45 degrees to the main run, allowing flow from the smaller-diameter branch to enter the primary drain line in a gradual, low-turbulence merge — maintaining drainage velocity, supporting solids conveyance, and avoiding the flow disruption and potential accumulation points that a 90-degree sanitary tee branch introduces in horizontal drain runs.

The 3" to 1-1/4" size differential positions this fitting between the smallest fixture-drain connections and the mid-size lateral drains served by the 1-1/2" branch variant (475-337). While 1-1/4" drain connections are less common in modern commercial plumbing than 1-1/2", they remain prevalent in older building stock, certain fixture types, and specific equipment drain configurations — making the 475-336 a practical stocking item for renovation, retrofit, and service work on existing drain systems, as well as for new construction where 1-1/4" fixture or equipment drains are specified.

All socket ends accept PVC pipe via solvent cement, creating permanent, leak-free joints throughout the assembly. As with all wye fittings in horizontal DWV applications, the 45-degree branch angle is a key performance characteristic — many plumbing codes specify or recommend wye fittings over sanitary tees for horizontal-to-horizontal drain branches precisely because the angled entry supports self-scouring flow velocities and minimizes the dead zones where solids and debris accumulate over the life of the drain system.

Manufactured to ASTM D2665 standards and listed under NSF/ANSI 14, the 475-336 is molded from white Schedule 40 PVC, appropriate for above-ground and underground DWV applications across a broad range of commercial, institutional, and industrial drain system configurations.

Specifications:

Industries & Applications:

• Commercial Plumbing & DWV Systems — Applied in 3" horizontal drain mains in commercial buildings, restaurants, hotels, and institutional facilities where individual 1-1/4" fixture or equipment drains must connect to the collection main at a code-compliant 45-degree entry angle; particularly relevant in renovation and retrofit work on existing buildings where 1-1/4" drain connections remain in service
• Food & Beverage Processing — Used in facility drain systems where 1-1/4" equipment waste lines — beverage dispensing units, small prep equipment drains, and bar sink outlets — must enter a 3" main drain run; the wye geometry supports hygienic, self-clearing flow at the branch junction and minimizes solids accumulation in food service environments
• Healthcare & Institutional Facilities — Installed in sanitary drain systems in hospitals, clinics, schools, and care facilities where older fixture drain sizing or specific equipment drain configurations produce 1-1/4" branch connections that must tie into a 3" collection main at a plumbing code-compliant angle
• HVAC & Mechanical Systems — Applied in condensate drain collection systems where 1-1/4" HVAC unit drain lines or equipment condensate outlets consolidate into a 3" main condensate or floor drain run; the 45-degree wye entry reduces backflow risk and supports reliable gravity drainage across multi-unit mechanical systems
• Industrial Process Drainage — Used in plant floor drain networks and equipment drain collection systems where 1-1/4" machinery drain lines, coolant return drains, or process equipment outlets must enter a 3" gravity drain main with minimal turbulence and dependable long-term performance
• Renovation & Retrofit Construction — Particularly well-suited for drain system upgrades and building renovations where existing 1-1/4" fixture or equipment drain rough-ins must be connected to new or upsized 3" main drain runs without repiping the branch connections