Ay Mcdonald 5423-279 Pex-a Brass Insert Female Sweat Adapter

Product Description

The AY MCDONALD 5423-279 is a lead-free brass insert adapter designed to transition a 0.5-inch PEX-A tubing run to a female sweat (solder) copper connection. The insert end expands into PEX-A pipe using an expansion tool, creating a reliable, compression-style seal when the pipe contracts around the fitting. The female sweat end accepts a standard copper male-sweat fitting or valve, allowing integration with existing copper systems. Licensed plumbers install this fitting in residential and light commercial potable water distribution systems where PEX-A and copper must be joined at a transition point.

This adapter is suited for cold and hot water supply lines in new construction and retrofit projects. It is commonly used where a PEX-A branch line meets a copper manifold, shutoff valve, or fixture connection. The lead-free brass construction meets requirements for potable water contact. The fitting is appropriate for concealed and exposed installations in walls, ceilings, and mechanical spaces.

Key Features

• Lead-free brass construction rated for potable water service
• PEX-A insert end requires an expansion tool for installation, producing a strong mechanical connection
• Female sweat end solders to standard copper male-sweat fittings and valves
• 0.5-inch nominal size fits standard half-inch PEX-A tubing
• Compact design allows installation in tight spaces typical of residential rough-in work

Compatibility

Designed as an OEM-style transition fitting for 0.5-inch PEX-A tubing systems connecting to female sweat copper fittings in residential and light commercial potable water applications.

Installation Notes

Installation of the PEX-A insert end requires a compatible PEX-A expansion tool and the appropriate expander head for 0.5-inch tubing. Shut off the water supply and depressurize the line before beginning work. The female sweat end should be soldered by a licensed plumber following applicable IPC and local plumbing code requirements, using lead-free solder on potable water systems. Allow solder joints to cool fully before restoring pressure to the line.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.