Ay Mcdonald 5423-276 Pex-a Brass Insert Sweat Adapter 1 in

Product Description

The AY MCDONALD 5423-276 is a 1-inch lead-free brass insert adapter designed to transition PEX-A tubing to a male sweat (solder) copper connection. This fitting allows a licensed plumber to bridge PEX-A flexible pipe runs to copper sweat fittings without additional adapters or specialty tools beyond standard PEX expansion and sweat equipment. The lead-free brass construction meets potable water requirements, making it appropriate for domestic water supply systems in residential and light commercial applications. Its insert-style end grips the interior of the PEX-A tube after expansion, creating a reliable, watertight mechanical connection.

This adapter is used where PEX-A distribution lines must terminate at or connect to copper sweat assemblies. Common install scenarios include mixing manifold transitions, water heater connections, fixture supply rough-ins, and retrofit work where existing copper lines are being extended with PEX-A. The 1-inch size suits main distribution runs in residential systems and branch mains in small commercial builds. It is intended for use with PEX-A tubing only, not PEX-B or PEX-C, as the expansion method is specific to PEX-A material memory properties.

Key Features

• Lead-free brass construction meets NSF and Safe Drinking Water Act requirements for potable water contact
• Insert end designed for use with PEX-A expansion tooling for a secure, memory-fit connection
• Male sweat end solders to standard copper fittings using conventional torch and solder method
• 1-inch size fits main distribution and branch main applications
• Single-unit order increment allows purchase of exact quantities needed

Compatibility

Designed as an OEM-style transition fitting for 1-inch PEX-A tubing systems connecting to copper sweat piping assemblies in residential and light commercial potable water applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the line before beginning work. Use a calibrated PEX-A expansion tool sized for 1-inch tubing to expand the PEX-A end before seating the insert; allow the tubing to recover fully around the fitting. Complete all sweat soldering on the copper end before connecting to the PEX-A side to avoid heat damage to the tubing.