Uponor Q4771510 Reducing Coupling 1-1/2 X 1 in Propex

Product Description

The UPONOR Q4771510 is a reducing coupling designed for use in PEX piping systems. It connects a 1-1/2-inch nominal pipe to a 1-inch nominal pipe using the ProPEX expansion end style. The fitting is manufactured from modified polyphenylsulfone (MPPSU), a high-performance thermoplastic known for its resistance to heat, pressure, and chlorine degradation. Licensed plumbers install this coupling during new construction or remodel work where a transition between two PEX pipe diameters is required. The ProPEX connection method requires an expansion tool and PEX rings to create a secure, leak-resistant joint.

This reducing coupling is suited for residential and light commercial plumbing installations using PEX-a tubing. Typical applications include potable water distribution systems, in-wall supply lines, and manifold branch connections where pipe size must step down. The ProPEX end style is specific to Uponor PEX-a systems and requires compatible expansion rings and tooling during installation. Domestically sourced, this fitting meets requirements for use in potable water applications.

Key Features

• 1-1/2 inch to 1 inch nominal reducing configuration for stepping down pipe diameter
• ProPEX expansion end style for a reliable, tool-expanded mechanical connection
• Modified polyphenylsulfone (MPPSU) construction resists heat, pressure, and chemical degradation
• Suitable for potable water service in residential and light commercial systems
• Domestically manufactured

Compatibility

Designed for use with Uponor PEX-a tubing systems using the ProPEX expansion connection method. Compatible with 1-1/2-inch and 1-inch nominal PEX-a pipe and corresponding ProPEX expansion rings.

Installation Notes

Installation must be performed by a licensed plumber in accordance with applicable local plumbing codes and ASTM standards for PEX piping systems. Shut off the water supply and depressurize the line before making any connections. The ProPEX method requires a calibrated expansion tool and the correct size PEX expansion rings — do not attempt to connect using crimp or clamp tooling. Allow expanded fittings adequate time to recover before pressurizing the system.

Technical Specifications

• Nominal Size: 1-1/2 x 1 inches
• End Style: ProPEX
• Material: Modified Polyphenylsulfone (MPPSU)
• Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4771510