Uponor Q4775075 Reducing Coupling 1/2x3/4 in Propex

Product Description

The UPONOR Q4775075 is a reducing coupling designed for ProPEX expansion-style PEX piping systems. It connects a 1/2-inch nominal line to a 3/4-inch nominal line, making it a practical fitting for transitions between pipe sizes within a distribution system. The fitting is manufactured from polysulfone, a high-performance thermoplastic well-suited for potable water and hydronic applications. Installation requires a ProPEX expansion tool and the appropriate PEX expansion rings. Licensed plumbers and pipefitters working on residential or light commercial water distribution systems are the primary installers.

This reducing coupling is used wherever a ProPEX system requires a size transition from a 3/4-inch main or branch run down to a 1/2-inch supply line. Common applications include residential potable water distribution, radiant heating branch connections, and multi-zone hydronic systems where flow is divided from a larger header to smaller runouts. The domestic designation confirms the fitting is manufactured for the U.S. market.

Key Features

• 1/2 x 3/4 inch nominal reducing configuration for in-line size transitions
• ProPEX expansion end style — compatible with Uponor ProPEX expansion tooling and rings
• Polysulfone construction for durability in potable water and hydronic service
• Domestic manufacture

Compatibility

Designed for use in ProPEX expansion-style PEX piping systems using 1/2-inch and 3/4-inch nominal PEX tubing and the corresponding ProPEX expansion rings.

Installation Notes

Installation must be performed by a licensed plumber in accordance with applicable local plumbing codes and ASTM F1960 expansion fitting standards. Shut off the water supply and relieve system pressure before cutting into any existing line. Use the correct ProPEX expansion tool and ring size for each pipe diameter — do not mix ring sizes between the 1/2-inch and 3/4-inch ends. Allow expanded PEX ends to return to full compression around the fitting before pressurizing the system.

Technical Specifications

• Nominal Size: 1/2 x 3/4 inches
• End Style: ProPEX Expansion
• Material: Polysulfone
• Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4775075