Uponor Q4777510 Reducing Coupling 3/4 X 1 in Propex

Product Description

The UPONOR Q4777510 is a reducing coupling designed for ProPEX expansion-style connections, joining a 3/4-inch nominal line to a 1-inch nominal line in PEX piping systems. Manufactured from polysulfone, this fitting provides a reliable transition between two pipe sizes without the need for additional adapters. It is installed by licensed plumbers and pipefitters working on residential and light commercial hydronic heating, potable water distribution, and radiant floor systems where reducing connections are required.

This reducing coupling is suited for applications where a single pipe run steps down or steps up between 3/4-inch and 1-inch nominal PEX tubing. Typical scenarios include distribution manifold branch connections, zone supply lines, and retrofit tie-ins where existing piping changes size. The ProPEX end style requires a compatible expansion tool and PEX rings to create a secure, watertight joint. Domestically sourced, the fitting meets the requirements of plumbing systems where origin documentation may be necessary for project compliance.

Key Features

• Reduces between 3/4-inch and 1-inch nominal PEX pipe sizes in a single fitting
• ProPEX end style for expansion-tool-based, ring-and-sleeve connections
• Polysulfone construction offers resistance to elevated temperatures and pressures common in hydronic and potable water systems
• Domestic manufacture for projects requiring US-origin materials
• No solder, glue, or open flame required during installation

Compatibility

Designed as an OEM-style ProPEX fitting compatible with standard PEX-a tubing systems using the expansion connection method and appropriately sized ProPEX rings.

Installation Notes

Installation should be performed by a licensed plumber following applicable IPC or local plumbing code requirements. Shut off and depressurize the water supply before cutting into any existing line. A calibrated ProPEX expansion tool and the correct nominal-size PEX rings are required to form a proper joint. Allow expanded fittings to recover fully before pressurizing the system.

Technical Specifications

• Connection Size: 3/4 x 1 inch nominal
• End Style: ProPEX
• Material: Polysulfone
• Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4777510