1 inch PEX Brass Insert Adapter PEX x Female

LF4571010 – 1" PEX x 1" FPT Brass Transition Adapter

The LF4571010 brass insert adapter is designed to transition between 1" PEX tubing and 1" female pipe thread (FPT) connections. Manufactured to ASTM and NSF standards, this fitting enables secure, code-compliant connections in potable water distribution systems using cross-linked polyethylene (PEX) piping.

Constructed from lead-free brass per the requirements of the Safe Drinking Water Act (SDWA), this transition adapter ensures material compatibility and durability in both residential and commercial plumbing applications. Its machined barb end is engineered for cold-expansion PEX connections, while the threaded end mates with standard NPT male-threaded fittings.

Design and Material Characteristics

• ✅ Material Composition: Lead-free brass (compliant with NSF/ANSI 61 & 372)
• ✅ Connection Ends: Cold-expansion PEX barb x Female NPT
• ✅ System Compatibility: Suitable for ASTM F1960 PEX tubing and fittings
• ✅ Pressure Rating: Rated to 200 psi at 73°F (per PEX system specifications)
• ✅ Corrosion Resistance: Brass construction resists dezincification and stress cracking in potable water systems

Technical Specifications

• Model: LF4571010
• PEX Side: 1" cold-expansion (ASTM F1960)
• Threaded Side: 1" FPT (NPT standard)
• Material: Lead-free brass
• Certifications: NSF 61, NSF 372, ASTM F1960

Installation Requirements

Proper installation of this adapter requires a cold-expansion tool with an approved PEX sleeve on the barb end. For the threaded side, apply PTFE tape or thread sealant appropriate to the application. Avoid overtightening to prevent thread distortion. Adapters should be installed in accordance with local plumbing codes and the PEX manufacturer’s specifications.

Application Use

This transition fitting is commonly used in new construction and retrofits where 1" PEX tubing must interface with threaded brass, copper, or steel fittings. Typical use cases include water heater connections, manifolds, and distribution piping in residential or multifamily systems.

Regulatory Note

Per federal legislation and state plumbing codes, all fittings intended for potable water must meet lead-free requirements under the Reduction of Lead in Drinking Water Act. The LF4571010 adapter complies with these mandates for use in public and private water supply systems.