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.

Technical Specifications

• Connection Type: PEX-A Insert x Female Sweat (Solder)
• Size: 0.5 inches
• Material: Lead-Free Brass
• UPC: 811734021748
• Order Increment: 1

Standard Information

• Brand: AY MCDONALD
• Manufacturer Part Number: 5423-279