3 inch x 1-1/2 inch PCV DWV Reducing Coupling Plastic x Plastic

3 inch x 1-1/2 inch PVC DWV Reducing Coupling – Socket x Socket

The 3 inch x 1-1/2 inch PVC DWV Reducing Coupling is a solvent-weld fitting designed for secure transitions between nominal pipe sizes in drain, waste, and vent (DWV) systems. Fabricated from rigid polyvinyl chloride (PVC), this coupling ensures consistent flow characteristics and dimensional stability under gravity flow conditions.

Its dual-socket configuration facilitates a streamlined connection between 3-inch and 1-1/2-inch DWV piping, meeting the sizing demands of branch lines or fixture drains. Compatible with ASTM D2665 Schedule 40 DWV pipe, the coupling is engineered to meet or exceed applicable building and plumbing code requirements for non-pressurized drainage systems.

Product Specifications

• Material: PVC (Polyvinyl Chloride)
• Size: 3 inch x 1-1/2 inch
• Connection Type: Socket x Socket (solvent weld)
• Standards: Conforms to ASTM D2665, CSA B181.2
• Application: Gravity-flow DWV systems

Performance Characteristics

• ✅ Dimensional Accuracy – Machined for a tight fit and precise pipe alignment during installation.
• ✅ Chemical Resistance – Suitable for systems handling sanitary waste and household chemicals.
• ✅ Non-Corrosive – Inert PVC body prevents degradation from environmental or system exposure.
• ✅ Low Friction Loss – Interior surface promotes uninterrupted flow and minimizes buildup.
• ✅ Code-Compliant – Approved for use in residential and commercial DWV piping networks.

Recommended Applications

This fitting is commonly used in vertical and horizontal DWV runs, fixture arm connections, and branch transitions in residential, commercial, and institutional buildings. It is particularly useful in retrofits requiring pipe size reduction with minimal system disturbance.

Installation Notes

Use standard primer and solvent cement for proper assembly. Ensure the pipe ends are cut square, deburred, and dry-fitted before applying solvent. Do not use in pressurized applications. Installation should follow applicable plumbing codes and manufacturer instructions for joining PVC components.

Did You Know?

DWV fittings like this reducing coupling are rated for non-pressurized use only and are identified by a different wall thickness and pressure classification than potable pressure-rated PVC fittings (e.g., Schedule 40 pressure pipe).

The 3 inch x 1-1/2 inch PVC DWV Reducing Coupling delivers consistent performance where space and size changes are required in drainage layouts. Its construction and compliance credentials make it a dependable choice for contractors who demand reliability and long-term system integrity.