Uponor LF4527575 Male Adapter 3/4 in Pex X Mnpt Brass

Product Description

The UPONOR LF4527575 is a 3/4 inch lead-free brass male adapter designed to transition PEX tubing to a male NPT threaded connection. This fitting serves as a critical junction point in PEX-based plumbing systems, allowing PEX supply lines to connect directly to threaded fixtures, valves, or equipment. Manufactured from lead-free brass, it meets drinking water compliance requirements for potable water installations. Licensed plumbers install this adapter in both new construction and retrofit projects where PEX tubing meets threaded iron or brass fittings.

This adapter is suited for residential and light commercial plumbing applications including domestic water distribution, fixture supply lines, and water heater connections. The PEX end accepts a standard expansion or crimp-style connection depending on the installation method, while the male NPT thread connects to standard female-threaded fittings and valves. It is marked as domestic, indicating USA-sourced manufacture.

Key Features

• Lead-free brass construction meets Safe Drinking Water Act compliance for potable water use
• 3/4 inch PEX inlet transitions to 3/4 inch male NPT thread
• Brass body resists corrosion in hot and cold water service
• Domestic manufacture for projects requiring USA-made fittings
• Compatible with standard PEX installation tooling for crimp or expansion connections

Compatibility

Designed as an OEM-style fitting for 3/4 inch PEX plumbing systems requiring a transition to male NPT threaded connections in residential or light commercial potable water applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the water supply and relieve system pressure before making any connections. Use appropriate PEX tooling — either expansion or crimp — per the fitting design, and apply thread sealant or PTFE tape to the male NPT threads before engaging any female-threaded connections. Do not overtighten threaded connections, as this may damage mating fittings.

Technical Specifications

• Connection Type: PEX x MNPT
• Size: 3/4 inch
• Material: Lead-Free Brass
• Country of Origin: Domestic (USA)

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: LF4527575