Uponor Q4775050 Propex Coupling 1/2 Inch Polysulfone

Product Description

The UPONOR Q4775050 is a 1/2 inch nominal ProPEX coupling fitting used to join PEX tubing runs in hydronic and plumbing distribution systems. The fitting accepts ProPEX-style expansion ends, which require an expansion tool to install before the sleeve and fitting are joined. Constructed from polysulfone, this coupling offers resistance to high temperatures and the chemicals commonly encountered in potable water and heating applications. It is installed by plumbers and PEX-certified mechanical contractors working on residential and light commercial piping systems.

This coupling is suited for in-wall, in-slab, or exposed PEX distribution piping where a straight inline connection is needed. Typical applications include potable cold and hot water supply lines and hydronic radiant heating loops. The ProPEX expansion end style is specific to the Uponor PEX system, so this fitting is used alongside the corresponding Uponor expansion tool and PEX-a tubing. Domestic manufacture supports project requirements where country-of-origin compliance is specified.

Key Features

• 1/2 inch nominal size for standard residential and light commercial PEX distribution lines
• ProPEX expansion end style for secure, tool-expanded connections
• Polysulfone construction resists high temperatures and common water treatment chemicals
• Inline coupling design restores or extends continuous PEX tubing runs
• Domestically manufactured to support origin-based project compliance

Compatibility

Designed as an OEM-style replacement and standard component for ProPEX expansion-style PEX-a piping systems in residential and light commercial plumbing and hydronic applications.

Installation Notes

Installation requires a compatible ProPEX expansion tool and the appropriate PEX-a expansion ring before the fitting is inserted. Shut off the water supply and depressurize the line before cutting into any existing piping. Work should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Do not attempt to use this fitting with non-expansion crimp or clamp-style PEX systems, as end-style compatibility is required for a proper connection.

Technical Specifications

• Nominal Size: 1/2 inch
• End Style: ProPEX Expansion
• Material: Polysulfone
• Country of Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4775050