Parker PP4TU4 Push-to-connect Union Tee 1/4 Inch Od

Product Description

The PARKER PP4TU4 is a push-to-connect union tee fitting designed for tube-to-tube connections in fluid handling and pneumatic systems. Made from polypropylene, this fitting accepts 1/4 inch OD tubing on all three ports and requires no tools for assembly — tubing inserts directly until it seats and locks. The union tee configuration allows a single inline run to branch off to a third port, making it a common solution for distributing flow in low-pressure plumbing, chemical feed, and light-duty pneumatic lines. Rated at 150 psi, it suits a wide range of service conditions encountered in trade and light industrial applications.

This fitting is well suited for residential and light commercial applications where a fast, reliable tube connection is required without threaded fittings or compression tooling. Typical uses include water treatment equipment, chemical dispensing systems, irrigation controls, and pneumatic instrument tubing runs. The polypropylene body resists many common chemicals and mild acids, making it a practical choice in environments where brass or stainless fittings would be unnecessary or cost-prohibitive. Plumbers, HVAC technicians, and equipment service technicians commonly use these fittings during equipment installation or field repairs.

Key Features

• Push-to-connect design — no tools required for tube insertion
• Union tee configuration provides one inline run plus one branch port
• Accepts 1/4 inch OD tubing on all three ports
• Polypropylene construction offers good chemical resistance
• Rated at 150 psi working pressure
• Tan color aids visual identification in multi-fitting installations

Compatibility

Designed as an OEM-style push-to-connect replacement or new-installation fitting for systems using 1/4 inch OD tubing in low-pressure fluid and pneumatic applications.

Installation Notes

Shut off system pressure and depressurize the line before removing or installing push-to-connect fittings. Ensure tubing ends are cut cleanly and squarely with no burrs or debris before insertion, as uneven cuts can compromise the internal collet seal. To release tubing, depress the collet ring evenly while pulling the tube straight back. Polypropylene fittings should not be used on lines carrying compressed gases at elevated temperatures or with solvents incompatible with the base material — verify chemical compatibility before installation.