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The UPONOR LFP4515050 is a ProPEX Press Adapter designed to transition a 1/2-inch PEX tubing connection to a 1/2-inch copper pipe end. Constructed from lead-free brass, this adapter meets low-lead compliance requirements for potable water systems. It is domestically manufactured and uses Uponor's ProPEX expansion method on the PEX end, requiring a compatible ProPEX expansion tool for installation. Plumbers and pipefitters install this fitting in residential and light commercial plumbing systems wherever a PEX distribution line must connect to an existing copper branch or service stub.
This adapter is suited for potable water supply systems, including hot and cold distribution lines, where a direct PEX-to-copper transition is required. It is commonly installed during renovation or retrofit work when new PEX runs tie into existing copper infrastructure. The fitting is appropriate for concealed and accessible locations within walls, ceilings, and mechanical rooms. Its lead-free brass construction makes it compliant for use in drinking water applications under applicable plumbing codes.
Designed as an OEM-style ProPEX fitting for use in residential and light commercial PEX-to-copper plumbing transitions. Specific system or model compatibility was not provided in the product data; verify fitment with your ProPEX tool size and copper pipe schedule before installation.
Installation of the ProPEX end requires a calibrated Uponor ProPEX expansion tool and the correct size PEX expansion ring; do not attempt to install without the proper expansion tool. Shut off the water supply and depressurize the line before beginning any fitting work. The copper end should be deburred, cleaned, and joined per IPC and local plumbing code requirements, whether soldered or pressed. This fitting should be installed by a licensed plumber familiar with ProPEX methods.
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