Parker PPB6TU4-MG Push-to-connect Union 3/8 X 1/4 in Od

Product Description

The PARKER PPB6TU4-MG is a push-to-connect union tube fitting designed to join two tube runs quickly without tools or solder. It accepts 3/8 inch OD tubing on one end and 1/4 inch OD tubing on the other, making it a reducing union for mismatched line sizes. The fitting body is constructed from polypropylene and is rated to 150 psi. It is used in pneumatic, fluid transfer, and light-duty process lines where a fast, leak-resistant connection is required. Plumbers, HVAC technicians, and industrial service pros install these fittings when speed and reusability matter.

This fitting is suited for residential and light commercial applications involving air lines, water supply tubing, and low-pressure fluid systems. The push-to-connect mechanism allows the fitting to be installed by hand — simply insert the tube to the stop — and released with a collet sleeve when removal is needed. It is a practical choice for tight spaces where wrench clearance is limited or where the line may need to be disconnected during servicing.

Key Features

• Reduces 3/8 inch OD to 1/4 inch OD in a single inline union fitting
• Polypropylene construction resists corrosion and chemical exposure in compatible fluid service
• Rated to 150 psi for use in low-to-medium pressure pneumatic and fluid lines
• Tool-free installation — tube inserts and locks without fittings, clamps, or solder
• Collet-release design allows the tube to be removed and reconnected during service

Compatibility

Designed as an OEM-style push-to-connect replacement union for systems using 3/8 inch and 1/4 inch OD tubing in low-pressure pneumatic or fluid transfer service.

Installation Notes

Installation is performed by plumbers or HVAC technicians working on low-pressure lines. Before installing or removing the fitting, shut off and depressurize the line completely. Verify that the tube end is cut square and deburred before insertion to ensure a proper seal. Do not exceed the 150 psi pressure rating or use this fitting with fluids incompatible with polypropylene.