Parker A5TU5-MG Push-to-connect Union Tee 5/16 Inch Od

Product Description

The PARKER A5TU5-MG is a push-to-connect union tee tube fitting designed to join three segments of 5/16-inch OD tubing without tools or thread sealant. Constructed from polyoxymethylene (POM), a dense acetal resin, this fitting handles pressures up to 300 psi. The push-to-connect mechanism allows tubing to seat and lock in seconds, making it a practical choice for technicians who need a leak-free tee connection during installation or service calls. The tan POM body resists moisture and many common fluids encountered in HVAC, refrigeration, and fluid-handling systems.

This fitting is suited for residential and light commercial applications where 5/16-inch OD tubing is routed in tee configurations. Typical install scenarios include condensate lines, pneumatic control tubing, and low-pressure fluid distribution lines. Plumbers, HVAC technicians, and mechanical contractors install this type of fitting where a compact, tool-free connection is preferred over compression or flare fittings. The single-piece union tee design eliminates the need for separate adapters at the branch leg.

Key Features

• Push-to-connect design — tubing seats and locks without tools or thread compound
• Polyoxymethylene (POM) body rated to 300 psi
• Accepts 5/16-inch OD tubing on all three ports
• Tan color for quick visual identification on the job
• Compact union tee geometry for tight-space routing

Compatibility

Designed as an OEM-style push-to-connect replacement or new-installation tee fitting for systems using 5/16-inch OD tubing in low-to-medium pressure fluid or pneumatic applications.

Installation Notes

Shut off system pressure and depressurize the line before removing or installing any fitting. Ensure tubing ends are cut square and deburred so they seat fully in the collet — an incomplete seat is the leading cause of push-to-connect leaks. Verify that tubing OD is within the manufacturer tolerance for 5/16-inch collet fittings before assembly. To release tubing, press the collet ring toward the fitting body while pulling the tube out; never pull tubing without releasing the collet.