4 inch PVC DWV Double Wye Plastic x Plastic x Plastic x Plastic

4 inch PVC Double Wye – High-Capacity Drainage Fitting for DWV Systems

The 4-inch PVC Double Wye is designed for directional flow in drain, waste, and vent (DWV) systems. Engineered for performance in both residential and commercial installations, this fitting allows for smooth merging of two horizontal lines into a main branch line at a consistent angle, optimizing flow efficiency while maintaining system integrity.

Key Advantages

• ✅ Optimized Flow Direction – The 45-degree wye branches promote consistent laminar flow, reducing turbulence and likelihood of clogging.
• ✅ Injection-Molded PVC – Fabricated from impact-resistant Schedule 40 PVC that withstands system demands and complies with ASTM D2665 and D3311 specifications.
• ✅ Socket End Connections – Standard solvent weld sockets ensure secure, leak-resistant joints with compatible piping systems.
• ✅ Corrosion and Chemical Resistant – Engineered for DWV systems exposed to moisture, gases, and chemical vapors common in sanitary plumbing networks.

Technical Specifications

• Size: 4 inch x 4 inch x 4 inch x 4 inch
• Material: PVC (polyvinyl chloride), white
• Standard Compliance: ASTM D2665, D3311, and CSA B181.2
• Connection Type: Solvent weld (female hub)
• Usage: Non-pressurized sanitary drainage systems

Installation Considerations

Use solvent cement and primer per manufacturer and code guidelines to ensure a secure bond. Correct orientation of the wye is critical to maintaining gravity-fed flow direction. This fitting should be installed in horizontal piping systems and supported according to local code to prevent joint stress and misalignment.

Common Applications

The 4 inch PVC double wye is typically found in horizontal waste lines that serve multiple fixtures, such as bathroom groups or commercial sinks. It is a preferred choice for layouts requiring two side connections to merge into a single downstream pipe without flow restriction or cross-contamination.

Note on System Design

Unlike sanitary tees, which are used in vertical stacks, double wyes are designed exclusively for horizontal drainage to prevent siphoning and to meet venting requirements under IPC and UPC plumbing codes.

For reliable, code-compliant drainage systems, the 4 inch PVC Double Wye offers superior performance in routing and waste management. It’s a critical component for installers requiring long-lasting, efficient DWV connections.