Uponor LF4507575 Pex X Copper Adapter 3/4 Inch Brass

Product Description

The UPONOR LF4507575 is a 3/4-inch lead-free brass adapter designed to transition between PEX tubing and copper pipe in potable water and hydronic plumbing systems. This fitting uses a PEX connection on one end and a sweat-solder copper (C) connection on the other, allowing licensed plumbers to tie PEX runs directly into existing copper infrastructure. The lead-free brass construction meets drinking water standards for use in residential and light commercial potable water systems. It ships as a domestically sourced fitting suitable for both new construction and retrofit work.

This adapter is used wherever a PEX distribution system meets a copper mainline or branch — common scenarios include fixture stub-outs, manifold-to-copper transitions, and remodel work where new PEX is tied into an existing copper system. It is appropriate for both hot and cold water supply lines in residential and light commercial plumbing. The 3/4-inch size makes it a standard choice for main distribution lines and branch feeds serving multiple fixtures.

Key Features

• Lead-free brass construction for compliance with potable water applications
• 3/4-inch PEX x copper (sweat) end connections for direct system integration
• Domestically sourced fitting for projects requiring domestic content
• Compact adapter form factor for use in tight chase and wall cavities
• Compatible with standard PEX expansion or crimp installation methods per fitting design

Compatibility

Designed as an OEM-style replacement and standard transition fitting for 3/4-inch PEX-to-copper connections in residential and light commercial potable water plumbing systems.

Installation Notes

Installation is performed by a licensed plumber. Shut off the water supply and relieve system pressure before cutting into any existing copper line. The copper end is soldered using standard sweat-joint technique per IPC guidelines; ensure the fitting and pipe are fully dry before applying heat. The PEX end should be installed using the appropriate expansion or crimp tooling specified for the fitting type.

Technical Specifications

• Connection Type: PEX x Copper (sweat)
• Size: 3/4 inches
• Material: Brass, Lead-Free
• Origin: Domestic

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: LF4507575