1-1/2 inch or 1-1/4 inch Drain & Trap Connector

1-1/2 inch Flexible Coupling – PVC and Cast Iron Transition Connector

The 1-1/2 inch flexible coupling is a heavy-duty elastomeric fitting designed for joining two 1-1/2 inch nominal pipes of the same or dissimilar materials, such as PVC, cast iron, steel, or copper. Manufactured from flexible PVC and secured using corrosion-resistant stainless steel clamps, this coupling accommodates slight pipe misalignment and movement while maintaining a watertight seal.

It is commonly used in gravity-flow drainage, waste, and vent systems, and is certified for underground and above-grade installations. The coupling conforms to applicable performance standards for non-pressure pipe connections in residential and commercial plumbing systems.

Product Features

• ✅ Size: 1-1/2 inch nominal pipe size
• ✅ Material: Flexible PVC body with 300-series stainless steel bands and screw housings
• ✅ Connection Type: Mechanical joint secured with stainless steel torque clamps
• ✅ Application: For use in non-pressurized DWV and sewer systems
• ✅ Temperature Range: -30°F to 140°F continuous service

Installation Guidelines

Ensure that pipe ends are clean and square-cut prior to installation. Position the coupling over the joint, center the band over the gap, and tighten stainless steel clamps to manufacturer-specified torque (typically 60 in-lbs) using a calibrated torque wrench or screwdriver. Proper installation ensures long-term resistance to infiltration, exfiltration, and root intrusion in buried applications.

Common Applications

This coupling is suitable for repairs, transitions, and retrofits in drain, waste, and vent lines. It is frequently used in sanitary sewer laterals, vent stacks, and under-slab plumbing where quick mechanical connection between dissimilar piping is required without the need for solvent welding or threading.

Regulatory Compliance

Flexible couplings of this type are tested to and meet the requirements of ASTM C1173 and are certified to UPC and CSA B602 standards. Accepted by major model plumbing codes for use in DWV and sewer applications.

Technical Specifications

• Nominal Size: 1-1/2 inch
• Body Material: PVC conforming to ASTM C1173
• Clamp Material: Stainless Steel (Type 300 series)
• Standards: UPC, CSA B602, ASTM C1173
• Pressure Rating: For use in non-pressure systems only