1-1/2 inch x 1-1/4 inch Proflex Reducing Coupling Connects Copper to Cast Iron, PVC, Steel

1-1/2 inch x 1-1/4 inch Proflex Shielded Reducing Coupling – Engineered for Transition Joints

The 1-1/2 inch x 1-1/4 inch Proflex reducing coupling is designed for use in drain, waste, and vent (DWV) systems to join pipes of dissimilar materials or sizes. Constructed with a stainless steel shield and molded elastomeric body, this coupling offers a secure transition between cast iron, copper, steel, and plastic piping, while maintaining compliance with ASTM C1460 and CSA B602 standards.

Built for high-performance environments, the coupling provides superior resistance to shear forces, vibration, and pressure variations often encountered in horizontal and vertical piping assemblies. Its flexible design simplifies alignment without compromising joint integrity, making it an ideal solution for both new construction and retrofit applications.

Performance-Driven Features

• ✅ Materials: Stainless steel clamp and shield, EPDM rubber sleeve rated for above- and below-ground use
• ✅ Torque Bands: 300-series stainless steel bands maintain constant pressure and resist corrosion in corrosive soil or atmospheric conditions
• ✅ Connection Range: Joins 1-1/2 inch Schedule 40 DWV to 1-1/4 inch Schedule 40 DWV or equivalent diameter metallic pipe
• ✅ Sealing Performance: Provides a watertight and root-resistant seal capable of withstanding infiltration and exfiltration stresses

Application Environments

This reducing coupling is commonly used in residential and light commercial DWV applications, including pipe transitions in floor slabs, wall chases, and crawl spaces. It is particularly effective for adapting between differing legacy systems during renovation work or fixture replacements.

Installation Recommendations

Install using a calibrated torque wrench to tighten the stainless bands to manufacturer-specified torque values (typically 60 in-lbs) to ensure uniform compression and secure sealing. Ensure pipe ends are clean, cut square, and properly deburred prior to insertion. No solvent welding, soldering, or special tools are required.

Code Compliance and Standards

• Complies with ASTM C1460 for shielded couplings
• Certified to CSA B602 and IAPMO listed
• Lead-free construction; safe for use in potable and non-potable systems

Technical Note

For pressurized water supply systems, this coupling is not recommended. It is designed exclusively for non-pressure DWV use. Always verify local plumbing code acceptance prior to installation in municipal or commercial projects.

The 1-1/2 inch x 1-1/4 inch Proflex Shielded Reducing Coupling is a reliable and code-compliant choice for transitions between piping materials and sizes in drainage systems. Its mechanical sealing performance and flexibility make it a trusted component in professional-grade plumbing installations.