Ay Mcdonald 5423-274 Pex-a Brass Insert Sweat Adapter 3/4 in

Product Description

The AY MCDONALD 5423-274 is a 3/4-inch lead-free brass insert adapter designed to transition PEX-A tubing to a male sweat (solder) copper connection. This fitting serves as a critical transition point in hydronic, potable water, and plumbing distribution systems where PEX-A flexible tubing meets rigid copper pipe or copper-sweat valves and fixtures. Manufactured from lead-free brass, it meets federal and state safe drinking water standards for potable water applications. Licensed plumbers install this adapter during rough-in and finish plumbing work where PEX-A and copper systems intersect.

This adapter is suited for residential and light commercial plumbing systems using PEX-A tubing. It is a common fitting in radiant heating distribution, domestic hot and cold water supply lines, and retrofit applications where existing copper infrastructure is being connected to new PEX-A runs. The insert end accepts standard 3/4-inch PEX-A tubing secured with an expansion ring or crimp ring per the installation method used, while the male sweat end solders directly to standard copper fittings and pipe.

Key Features

• Lead-free brass construction meets Safe Drinking Water Act requirements for potable water use
• 3/4-inch PEX-A insert end compatible with PEX-A expansion or crimp connection methods
• Male sweat end solders to standard 3/4-inch copper fittings and pipe
• Single-piece brass body for durable, corrosion-resistant performance in wet environments
• Order increment of 1, suitable for single-fitting replacement or new installation

Compatibility

Designed as an OEM-style transition fitting for 3/4-inch PEX-A tubing to 3/4-inch male sweat copper connections in residential and light commercial plumbing systems.

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 installation. The insert end requires a proper PEX-A expansion tool or crimp tool depending on the connection method used — never use push-fit or barb methods on this fitting type. The male sweat end must be soldered using appropriate flux and lead-free solder per applicable code requirements.

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.