4 inch x 4 inch x 3 inch x 3 inch PVC DWV Double Reducing Sanitary Tee Plastic x Plastic x Plastic

4 inch x 3 inch PVC DWV Double Tee – Solvent Weld Fitting for Horizontal Drainage Applications

The 4 inch x 3 inch PVC Double Tee is a drainage, waste, and vent (DWV) system fitting designed to connect three drain branches to a common horizontal line. With solvent weld socket connections on all inlets and outlets, this fitting provides reliable flow management and venting in non-pressurized plumbing systems. The double tee configuration supports multi-directional flow in compliance with standard DWV layout requirements.

Manufactured from rigid polyvinyl chloride (PVC), this fitting is suitable for use in gravity-flow drainage systems in residential, commercial, and institutional buildings. It conforms to ASTM D2665 specifications for PVC plastic drainage systems and is listed under applicable plumbing code approvals for DWV components.

Technical Specifications

• Material: PVC Type I, cell classification 12454 per ASTM D1784
• Configuration: Double sanitary tee – solvent weld hub x hub x hub x hub
• Size: 4 inch main run x 3 inch branch
• Standard Compliance: ASTM D2665, NSF-listed for DWV applications
• Temperature Range: Up to 140°F intermittent service

Key Features

• ✅ Code-Compliant Design: Meets IPC/UPC standards for use in horizontal drainage and vent systems
• ✅ Corrosion-Resistant PVC Construction: Suitable for use in indoor or concealed wall applications without degradation
• ✅ Solvent Weld Joints: Socket ends are compatible with standard PVC primer and cement bonding methods
• ✅ Lightweight Material: Easy to handle and install on-site without special tools

Installation Guidelines

All joint surfaces should be clean and dry prior to solvent welding. Use ASTM F656 primer and ASTM D2564 PVC solvent cement for proper bonding. Ensure full insertion into socket depths and allow adequate cure time prior to system testing. Install per manufacturer guidelines and applicable plumbing code for DWV orientation and branch layout.

Common Applications

This 4 inch x 3 inch PVC DWV double tee is typically used in:

• Horizontal drain piping for bathrooms and group fixtures
• Branch line intersections requiring symmetrical tee connections
• Vent connections within DWV stacks
• Wall cavity and utility chases in multi-unit or slab-on-grade construction

Code and Safety Note

DWV fittings are not designed for pressurized systems. They are specifically intended for use in sanitary waste and vent applications where gravity flow is maintained. Proper sizing, slope, and orientation per code are required to ensure system performance and to prevent air admittance or siphonage failures.

The 4 inch x 3 inch PVC Double Tee DWV provides a compliant and durable solution for complex drainage configurations. Its solvent weld design, dimensional accuracy, and corrosion-resistant construction make it a standard component in code-approved DWV installations.