Ay Mcdonald 4423-392 Pex-a Poly Insert Tee 3/4x3/4x1/2

Product Description

The AY MCDONALD 4423-392 is a reducing poly insert tee designed for use in PEX-A tubing systems. It provides a branch connection in a potable water or hydronic distribution line, stepping down from a 3/4-inch run to a 1/2-inch branch outlet. The barbed insert design locks into PEX-A tubing when secured with a crimp ring or clamp ring, creating a leak-resistant joint without soldering or threading. Licensed plumbers and pipefitters install this fitting in residential and light commercial water supply systems where PEX-A tubing is the specified pipe material.

This fitting is suited for residential hot and cold water distribution lines as well as hydronic heating branch connections. The 3/4-inch by 3/4-inch by 1/2-inch configuration is commonly used at manifold takeoffs, fixture branch points, and zone supply splits where flow is being reduced to a smaller downstream line. It is intended for use exclusively with PEX-A tubing, where the expansion or barb-and-clamp method is the standard joining technique.

Key Features

• Reducing tee configuration: 3/4 inches x 3/4 inches x 1/2 inches for branch line transitions
• Compatible with PEX-A tubing systems using barb insert joining method
• Poly construction resists corrosion and scale buildup in water distribution applications
• Barbed insert ends secure with standard crimp or clamp rings for a reliable seal
• No soldering, threading, or open flame required during installation

Compatibility

Designed as an OEM-style insert fitting for PEX-A tubing systems in residential and light commercial water supply and hydronic piping applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC standards. Shut off the water supply and depressurize the line before cutting into existing tubing. Use a properly sized PEX crimp ring tool or clamp ring tool to secure the fitting to the tubing ends. Inspect each barbed connection for full seating before restoring system pressure.

Technical Specifications

• Connection Size: 3/4 inches x 3/4 inches x 1/2 inches
• Fitting Type: Reducing Insert Tee
• Tubing Compatibility: PEX-A
• Material: Poly (Polymer)
• UPC: 811734022752
• Order Increment: 1

Standard Information

• Brand: AY MCDONALD
• Manufacturer Part Number: 4423-392