Parker A6TU4-MG Push-to-connect Union Tee 3/8 X 1/4 Inch

Product Description

The PARKER A6TU4-MG is a push-to-connect union tee tube fitting designed for tube-to-tube connections in fluid and pneumatic distribution systems. It accepts tubing with a 3/8-inch outside diameter on one end and 1/4-inch outside diameter on the other, creating a tee branch without tools or thread sealant. The fitting is molded from polyoxymethylene (POM), a high-rigidity engineering thermoplastic that resists moisture, fuels, and common industrial chemicals. Rated to 300 psi, this fitting is appropriate for low- to medium-pressure pneumatic and liquid lines. Plumbers, HVAC technicians, and industrial service professionals install this type of fitting where quick, leak-free connections are required in tight or hard-to-reach locations.

The A6TU4-MG is suited for residential and light commercial applications where push-to-connect fittings simplify installation and service. Typical uses include compressed-air distribution, equipment pneumatic controls, water-treatment lines, and instrumentation tubing runs. The union tee configuration allows a single inline tube to be tapped for a branch line, making it useful during system additions or modifications. This fitting is sold individually and is intended for use with compatible rigid or semi-rigid tubing of the specified outside diameters.

Key Features

• Push-to-connect design allows tool-free tube insertion and secure retention
• Union tee configuration joins two tube sizes in a single branch fitting
• Polyoxymethylene (POM) construction provides high rigidity and chemical resistance
• Rated to 300 psi for low- to medium-pressure pneumatic and liquid service
• Tan color finish typical of POM push-to-connect fittings for easy visual identification
• Compact, lightweight design at 0.04 pounds for use in space-constrained installations

Compatibility

Designed for use with rigid or semi-rigid tubing measuring 3/8 inch and 1/4 inch outside diameter in pneumatic, fluid, or instrumentation systems requiring a push-to-connect union tee connection.

Installation Notes

This fitting should be installed by a qualified plumber, HVAC technician, or pneumatic systems professional. Before installation, depressurize and de-energize the system completely. Ensure tube ends are cut cleanly and squarely with a tube cutter and are free of burrs, as irregular ends can compromise the internal collet seal. Do not exceed the rated 300 psi operating pressure, and verify that the tube outside diameter matches the fitting port size before insertion.