Parker 165HD-6 Compression Tube Union 3/8 in Brass

Product Description

The PARKER 165HD-6 is a brass compression tube union designed to join two compression-end tube lines in a single inline connection. It accepts compression fittings on both ends, creating a secure, leak-resistant joint without soldering or threading. Rated to 1500 psi maximum working pressure and sized for 3/8 inch outside diameter tubing, this union is built for demanding service in refrigeration, HVAC, and fluid-system applications. Plumbers, refrigeration mechanics, and HVAC technicians install this fitting where a straight union connection is needed between two compression tube runs.

This union is suited for residential and light commercial installations involving copper or compatible tubing at 3/8 inch OD. Typical applications include refrigerant line repairs, water supply connections, and instrument tubing assemblies where a reliable compression-style union is required. The all-brass construction resists corrosion and holds up in wet or humid environments common to mechanical rooms and utility spaces.

Key Features

• Compression x compression end connections for tool-accessible, solder-free assembly
• Rated to 1500 psi maximum working pressure
• Sized for 3/8 inch outside diameter tubing
• Brass construction for corrosion resistance in wet and humid service environments
• Inline union configuration for straight tube-to-tube joining

Compatibility

Designed as an OEM-style replacement and service fitting for compression tube systems using 3/8 inch outside diameter tubing with standard compression connections.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians following applicable IPC or IMC guidelines. Shut off and depressurize the line before disassembly or fitting installation. Hand-tighten the compression nut onto the tube, then advance with a wrench per standard compression fitting practice — do not overtighten, as excessive torque can deform the ferrule and cause leaks. Pressure-test the connection before returning the system to service.