3 inch x 3 inch x 2 inch x 2 inch PVC DWV Double Reducing Wye Plastic x Plastic x Plastic x Plastic

4 inch PVC Double Wye – Schedule 40 DWV Fitting for Horizontal Branch Transitions

The 4 inch PVC Double Wye is a Schedule 40 DWV (Drain-Waste-Vent) fitting engineered for horizontal drain line applications where dual branch connections are required. This solvent-welded fitting is designed to facilitate consistent directional flow at a 45-degree angle, reducing turbulence and supporting code-compliant drainage performance in residential and commercial systems.

Manufactured from ASTM D1784 Type 1, Grade 1 cell-classified PVC, and tested to meet ASTM D2665 and D3311 dimensional standards, the fitting ensures compatibility with standard SDR pipe sizes. Its smooth interior wall surface reduces friction loss and inhibits scale buildup over time, contributing to sustained system performance.

Product Specifications

• Material: PVC (Polyvinyl Chloride), Schedule 40
• Nominal Size: 4 inch x 4 inch x 4 inch x 4 inch
• Connection: Slip x Slip x Slip x Slip (hub ends)
• Standards: ASTM D2665, D3311, D1784; NSF 14 certified
• Temperature Rating: 140°F (continuous drain waste applications)
• Pressure Rating: Non-pressure DWV use only

Functional Design and Application

• ✅ Dual 45° Inlets – Promotes smooth directional flow with reduced flow resistance at junction points.
• ✅ Uniform Wall Thickness – Provides consistent strength and reliable solvent-weld bonding at every hub.
• ✅ Corrosion-Resistant – Inert to typical domestic wastewater and industrial chemical discharges within pH range 4–10.
• ✅ Installation Flexibility – Easily integrated into horizontal piping for vent and drain systems, including multi-fixture branch layouts.

Common Installations

• Horizontal sanitary drainage systems
• Fixture branch tie-ins in commercial buildings
• Multi-family housing DWV installations

Installation Considerations

To install, use primer and PVC solvent cement rated for Schedule 40 DWV systems. Cut and deburr pipe ends thoroughly to maintain full socket engagement. This fitting is intended for gravity flow drainage systems only and must be supported according to local code to maintain grade and alignment.

Code and Safety Compliance

This fitting is compliant with the Uniform Plumbing Code (UPC), International Plumbing Code (IPC), and Canadian Standards Association (CSA B181.2). It is not intended for use in pressurized systems or hot water service lines exceeding 140°F.

The 4 inch PVC Double Wye is an essential DWV component engineered for branch connectivity in gravity-fed drain lines. Its robust construction and dimensional integrity support code-approved configurations in large-scale drainage systems where multi-directional flow must be maintained without disruption.