Uponor LF4521010 Male Adapter 1 in Pex X Mnpt Brass

Product Description

The UPONOR LF4521010 is a 1-inch male adapter designed to transition from PEX tubing to a male NPT threaded connection. Constructed from lead-free brass, this fitting meets the material standards required for potable water systems. The adapter accepts PEX tubing on one end using the Uponor ProPEX expansion method and provides a male NPT thread on the opposite end for connection to valves, manifolds, or threaded fittings. It is installed by licensed plumbers in both residential and light commercial applications where PEX supply lines terminate at a threaded component.

This adapter is suited for use in domestic hot and cold water distribution systems. It is a common fitting in new construction and retrofit installations where PEX tubing transitions to copper or other threaded components at water heaters, shutoff valves, fixture supply lines, or manifold connections. The domestic designation confirms the fitting is manufactured for use in U.S. potable water systems and is compliant with low-lead content requirements applicable to plumbing fittings in contact with drinking water.

Key Features

• Lead-free brass construction suitable for potable water contact
• 1-inch PEX x male NPT configuration for direct thread-to-PEX transitions
• Compatible with the Uponor ProPEX expansion installation method
• Domestic manufacture designation meets U.S. plumbing material standards
• Suitable for both hot and cold water supply lines

Compatibility

Designed as an OEM-style fitting for use in 1-inch PEX tubing systems requiring a male NPT threaded transition, typical of residential and light commercial potable water distribution installations.

Installation Notes

Installation requires the Uponor ProPEX expansion tool and the appropriate 1-inch PEX expansion ring. Shut off the water supply and depressurize the line before cutting or fitting any components. This fitting must be installed by a licensed plumber in jurisdictions that require it, and work should conform to the applicable edition of the IPC or UPC as adopted locally. Do not overtighten the male NPT threads; use an approved thread sealant or PTFE tape and hand-tighten before applying final torque per standard plumbing practice.

Technical Specifications

• Size: 1 inch
• Connection Type: PEX x Male NPT
• Material: Lead-Free Brass
• Application: Potable Water (Domestic)

Standard Information

• Brand: UPONOR
• Manufacturer Part Number: LF4521010