Parker 36066000 Push-to-connect Union Fitting 3/8 in Od

Product Description

The PARKER 36066000 is a push-to-connect straight union tube fitting designed for tube-to-tube connections in both liquid and gas service applications. Constructed from nickel-plated brass, this fitting accepts 3/8-inch OD tubing on each end and delivers a rated working pressure of 435 psi. The overall length is 1.87 inches. Installation requires no tools for the tube connection itself — tubing inserts directly into the fitting body, locking in place automatically. The FKM O-ring provides a reliable, low-permeability seal across a wide service temperature range, making this fitting appropriate for demanding process and mechanical system plumbing.

This fitting is suited for residential and light commercial plumbing, HVAC, pneumatic, and process piping applications where a straight inline union is needed to join two lengths of 3/8-inch OD tubing. It handles both liquid and gas media and is FDA compliant, making it compatible with food-grade and potable-water-adjacent systems. HVAC technicians, plumbers, and industrial maintenance professionals commonly use fittings of this type in refrigeration lines, compressed air systems, and fluid transfer assemblies.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion for inline unions
• Nickel-plated brass construction resists corrosion in liquid and gas service
• Rated to 435 psi working pressure
• FKM O-ring seal supports service from -13 degrees F to 302 degrees F
• FDA compliant for use in food-adjacent and potable water applications
• Compatible with both liquid and gas media

Compatibility

Designed as an OEM-style push-to-connect straight union replacement for systems using 3/8-inch OD tubing in liquid or gas service.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified industrial maintenance personnel. Before servicing any line, depressurize the system completely and isolate the section being worked on. Ensure tubing ends are cut cleanly and squarely with a tube cutter and deburred before insertion to achieve a proper seal. Verify that the tubing OD matches the fitting specification before assembly.