Parker 165HD-4 Brass Compression Tube Union 2100 Psi

Product Description

The PARKER 165HD-4 is a brass compression tube union designed for joining two tube ends using compression-style end connections on both sides. This fitting creates a straight, inline union in tubing runs where a secure, leak-resistant joint is required without soldering or threading. Rated to 2100 psi maximum working pressure, the 165HD-4 is built for demanding fluid and gas handling applications. It is installed by plumbers, HVAC technicians, and refrigeration mechanics who require a reliable mechanical tube connection in tight spaces or field-service situations.

This compression union is suited for use in residential and light commercial plumbing, HVAC refrigerant or fluid lines, and pneumatic or hydraulic tubing systems where compression fittings are the specified connection method. Its brass construction provides corrosion resistance and durability across a wide range of compatible tube materials and media. The fitting is packaged individually and is appropriate for service and repair work as well as new installation runs.

Key Features

• Brass construction for corrosion resistance and long service life
• Compression x compression end connections on both sides for tool-assisted, no-solder installation
• 2100 psi maximum working pressure rating
• Straight union configuration for inline tube joining
• Compact form factor suitable for confined installation areas

Compatibility

Designed as an OEM-style compression tube union compatible with standard compression tubing systems in plumbing, HVAC, and fluid handling applications.

Installation Notes

This fitting is installed by licensed plumbers or qualified HVAC and refrigeration technicians. Before installation, shut off and depressurize the line completely. Use appropriate tube cutters and deburring tools to ensure a clean, square tube end before seating the compression ferrule. Follow applicable IPC or IFGC guidelines for fitting torque and joint inspection; do not overtighten, as this can damage the ferrule and compromise the seal.