Parker A4UC4-MG Push-to-connect Union 1/4 Inch Od

Product Description

The PARKER A4UC4-MG is a push-to-connect union tube fitting designed for tube-to-tube connections in pneumatic and fluid transfer systems. Made from polyoxymethylene (POM), this fitting accepts 1/4 inch OD tubing on both ends and delivers a rated working pressure of 300 psi. The union configuration allows straight inline joining of two tube runs without the need for tools. Plumbers, pneumatic system technicians, and industrial maintenance professionals install this type of fitting where quick, reliable tube connections are required and future disconnection may be needed.

This fitting is suited for light industrial, pneumatic, and fluid distribution applications where POM construction offers adequate chemical and mechanical resistance. The push-to-connect design is common in compressed air lines, water distribution manifolds, and instrumentation tubing. Its compact size and tan coloring are typical of Parker's A4U-series fittings used in clean, low-contamination environments. The 1/4 inch OD sizing fits standard tubing used across a range of residential and light commercial systems.

Key Features

• Push-to-connect design allows tool-free tube insertion and secure hold
• Union style joins two 1/4 inch OD tube ends inline
• Polyoxymethylene (POM) construction provides good rigidity and chemical resistance
• Rated to 300 psi working pressure
• Tan color finish consistent with Parker A4U-series product line
• Lightweight at 0.02 pounds — suitable for space-constrained installations

Compatibility

Designed as an OEM-style push-to-connect union fitting for systems using 1/4 inch OD tubing in pneumatic, water, or fluid distribution applications.

Installation Notes

Depressurize and isolate the line before removing or installing any push-to-connect fitting. Ensure tubing ends are cut cleanly and squarely with no burrs, as irregular cuts can compromise the internal collet seal and cause leaks. This fitting is intended for installation by qualified plumbers, pneumatic technicians, or industrial maintenance professionals familiar with push-to-connect systems. Verify that the tubing OD and material are within the fitting's rated operating parameters before placing into service.