Reducing Wye, PVC Schedule 40 6" x 4" (475-532)

The 6" x 4" PVC Schedule 40 Reducing Wye (475-532) is a 45-degree branch fitting that introduces a 4" outlet into a 6" pipeline run with the smooth, angular flow transition that distinguishes a wye from a standard tee configuration. By positioning the branch at 45 degrees rather than 90 degrees to the main run, the reducing wye produces significantly lower turbulence, reduced head loss, and a more gradual directional change at the junction — advantages that matter most in drainage, gravity-flow, and high-velocity systems where abrupt branch geometry creates flow restriction, solids accumulation, or erosion at the fitting body.

The size reduction from a 6" run to a 4" branch in a single fitting eliminates the need to install a full-size 6" wye followed by a separate 6"x4" reducer — consolidating two fittings into one, reducing installed joint count, and simplifying both the hydraulic design and the physical installation at the branch point. This single-component approach is especially practical in below-grade or confined installations where fitting footprint, burial depth, and joint access are constrained.

Manufactured from white PVC compound meeting ASTM D2466 dimensional standards, the 475-532 delivers the corrosion resistance, chemical inertness, lightweight handling, and long service life that make Schedule 40 PVC the dominant material for drainage, irrigation, and low-to-medium pressure process piping at this diameter range. The fitting accepts solvent cement on all three ports for a permanent, full-strength bond across the run and branch connections.

Specifications:

Use solvent cement appropriate for the pipe and fitting schedule. Heavy-bodied cement is recommended for socket joints at 4" and above. Allow full cure time before pressurizing or backfilling. Pressure-temperature derating applies at elevated service temperatures per ASTM standards.

Industries & Applications:

• Municipal & Residential Drainage — Gravity sewer, storm drain, and sanitary lateral systems requiring a 4" branch takeoff from a 6" trunk main with smooth flow transition to minimize solids settling and blockage risk at the junction
• Agricultural & Landscape Irrigation — 6" mainline distribution systems with 4" branch drops to sub-main headers, zone valve stations, or lateral distribution manifolds where low head loss at the branch preserves system pressure balance
• Industrial Process & Drainage Piping — Process waste, floor drain collection, and effluent conveyance systems requiring a reducing branch junction with minimal turbulence in gravity or low-pressure flow conditions
• Water & Wastewater Treatment — Plant drainage headers, backwash discharge lines, and gravity return systems where a 4" branch takeoff from a 6" collection main is required with smooth hydraulic transition
• Stormwater Management & Site Drainage — Underground stormwater collection networks requiring a 4" lateral branch junction off a 6" trunk pipe with reduced flow disruption in high-volume runoff conditions
• Swimming Pool & Aquatic Facility Piping — Main drain return and circulation piping where a reducing wye provides smooth branch flow for balanced hydraulic distribution across multiple circuits
• Industrial Ventilation & Exhaust Ducting — Low-pressure air handling and fume exhaust systems where PVC Schedule 40 is specified and a 45-degree reducing branch minimizes turbulent pressure drop at the junction
• Aquaculture & Hatchery Systems — Gravity-fed or low-pressure recirculation and drainage networks requiring a 4" branch reduction off a 6" main collection or distribution header