Parker A6UC4-MG Union Y Push-to-connect Fitting 3/8x1/4

Product Description

The PARKER A6UC4-MG is a push-to-connect union Y tube fitting designed for tube-to-tube connections in compressed air, pneumatic control, and fluid distribution systems. Constructed from polyoxymethylene (POM), a high-strength acetal resin, this fitting handles working pressures up to 300 psi. The push-to-connect design allows fast, tool-free tube insertion, making it a practical choice for HVAC controls technicians, pneumatic system installers, and plumbing professionals who need reliable inline branch connections. The tan-colored POM body resists moisture and common chemicals encountered in light industrial and mechanical system environments.

This fitting is suited for residential and light commercial applications where a Y-branch connection is needed between two tube runs. Typical install scenarios include pneumatic control tubing, instrument air lines, and fluid distribution manifolds. The 3/8 inch by 1/4 inch outside diameter configuration accommodates a reducing Y arrangement, allowing a single 3/8 inch tube run to branch or transition to a 1/4 inch tube run without additional adapters or fittings.

Key Features

• Push-to-connect design — no tools required for tube insertion or removal
• 300 psi working pressure rating
• Polyoxymethylene (POM) construction for chemical and moisture resistance
• Union Y configuration enables inline tube branching or reducing transitions
• Accommodates 3/8 inch and 1/4 inch OD tubing in a single fitting

Compatibility

Designed as an OEM-style push-to-connect fitting for use with 3/8 inch and 1/4 inch OD rigid or semi-rigid tubing in pneumatic, compressed air, and fluid distribution systems.

Installation Notes

Installation is performed by trade professionals including HVAC controls technicians, pneumatic system installers, and pipefitters. Depressurize and de-energize the system completely before removing or installing any fittings. Ensure tubing ends are cut square and free of burrs before insertion to achieve a proper seal. Verify that working pressure does not exceed the rated limit of the fitting throughout the system.