Uponor Q4772015 Reducing Coupling 2x1.5 in Propex

Product Description

The UPONOR Q4772015 is a reducing coupling designed for use in ProPEX expansion-style piping systems. It connects a 2-inch nominal pipe to a 1.5-inch nominal pipe using the ProPEX end style, which requires an expansion tool to seat the fitting. The body is molded from polyphenylsulfone (PPSU), a high-performance thermoplastic known for its thermal resistance and long-term durability in potable water and hydronic applications. Licensed plumbers and mechanical contractors install this fitting during new construction and retrofit work wherever a controlled pipe reduction is needed in a PEX distribution system.

This reducing coupling is used in residential and light commercial plumbing and hydronic heating systems that use ProPEX-compatible PEX tubing. It handles transitions from a 2-inch main to a 1.5-inch branch or sub-main run. The ProPEX connection method creates a reliable mechanical joint without soldering, crimping, or clamps, making it well suited for concealed or tight-access installations where a consistent, leak-resistant joint is critical.

Key Features

• Reduces from 2-inch nominal to 1.5-inch nominal in a single fitting
• ProPEX end style requires an expansion tool for installation — no solder or clamps needed
• Polyphenylsulfone (PPSU) body offers high thermal resistance and durability
• Compatible with ProPEX expansion PEX tubing systems
• Domestic manufacture

Compatibility

Designed for use with ProPEX expansion-style PEX piping systems requiring a 2-inch to 1.5-inch nominal reducing connection.

Installation Notes

Installation must be performed by a licensed plumber familiar with ProPEX expansion tooling. Shut off the water supply and depressurize the system before cutting into any existing piping. Use the correct ProPEX expansion tool and ring size for each pipe diameter — the 2-inch and 1.5-inch ends require separate ring sizes and tool heads. Verify local plumbing code requirements, including applicable IPC and IAPMO standards, before installation.

Technical Specifications

• Nominal Size: 2 x 1.5 inches
• End Style: ProPEX
• Material: Polyphenylsulfone (PPSU)
• Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: Q4772015