Parker PP4UC4 Push-to-connect Union Fitting 1/4 in Od

Product Description

The PARKER PP4UC4 is a push-to-connect union tube fitting designed for tube-to-tube connections in fluid handling and pneumatic systems. Constructed from polypropylene with a tan color finish, it accepts 1/4 inch outside diameter tubing on both ends and is rated to 150 psi. The push-to-connect design allows tool-free tube insertion and secure locking without threaded fittings or solder. Plumbers, HVAC technicians, and industrial service techs use this fitting when a fast, reliable inline union connection is needed in low-to-moderate pressure lines.

This fitting is suited for residential and light commercial plumbing, chemical handling lines, and pneumatic control tubing where polypropylene construction offers adequate chemical resistance. It is commonly installed in water treatment systems, RO plumbing, and tubing manifold assemblies. The 1/4 inch OD size is standard in many small-bore fluid and air distribution applications.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion and removal
• Rated to 150 psi for low-to-moderate pressure service
• Polypropylene construction provides good chemical resistance for water and mild chemical lines
• Accepts 1/4 inch OD tubing on both ends for inline union connections
• Compact, lightweight form factor at 0.01 pounds

Compatibility

Designed as an OEM-style replacement or new-installation union fitting for systems using 1/4 inch outside diameter push-to-connect tubing in fluid handling or pneumatic applications.

Installation Notes

Shut off the fluid or air supply and depressurize the line completely before installing or removing this fitting. Ensure tubing ends are cut cleanly and squarely with a tubing cutter for a proper seal. Insert tubing firmly until it seats fully in the collet. To release tubing, depress the collet ring evenly while pulling the tube straight out.