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.

Technical Specifications

• Size: 3/4 inches
• Connection Type: PEX-A Brass Insert x Male Sweat
• Material: Lead-Free Brass
• UPC: 811734021687
• Order Increment: 1

Standard Information

• Brand: AY MCDONALD
• Manufacturer Part Number: 5423-274