Uponor Q4771515 Propex Coupling 1-1/2 Inch

Product Description

The UPONOR Q4771515 is a 1-1/2 inch nominal ProPEX coupling designed for use in PEX piping systems. Constructed from modified polyphenylsulfone (PPSU), this fitting offers strong resistance to heat and pressure typical of residential and light commercial plumbing and hydronic applications. The ProPEX end style requires an expansion tool to form the connection, creating a reliable, leak-resistant joint as the PEX pipe memory causes it to compress tightly around the fitting. Licensed plumbers and pipefitters install this coupling when joining two sections of PEX tubing of the same diameter or restoring continuity after a pipe repair.

This coupling is suited for residential and light commercial potable water distribution, radiant heating, and hydronic piping systems where 1-1/2 inch PEX tubing is specified. The ProPEX expansion method is commonly used in new construction and remodel work where reliable, high-cycle connections are required. Domestic manufacturing supports projects with domestic-content compliance requirements.

Key Features

• 1-1/2 inch nominal size for direct coupling of same-diameter PEX tubing
• ProPEX expansion end style for a secure, memory-fit mechanical connection
• Modified polyphenylsulfone (PPSU) construction for high heat and pressure resistance
• Domestically manufactured to support buy-domestic project specifications
• Compatible with ProPEX expansion tooling for consistent installation results

Compatibility

Designed as an OEM-style ProPEX fitting for use with 1-1/2 inch PEX tubing in systems requiring the ProPEX expansion connection method.

Installation Notes

Installation requires a calibrated ProPEX expansion tool sized for 1-1/2 inch tubing. Shut off the water supply and depressurize the line before cutting into existing piping. Expand the PEX pipe end, seat the fitting fully, and allow the pipe memory to compress around the fitting before pressurizing. Work must comply with applicable local plumbing codes and IPC requirements for PEX installations.

Technical Specifications

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

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4771515