Parker 322HB-6-4PP Barbed Tube Union Connector 3/8 X 1/4 in

Product Description

The PARKER 322HB-6-4PP is a single-barb tube union connector designed to join two flexible tube lines of differing inside diameters in a straight inline configuration. Constructed from black polypropylene, this fitting accepts a 3/8-inch tube ID on one end and a 1/4-inch tube ID on the other, with corresponding outside diameter seats of 0.43 inches and 0.31 inches. The overall installed length is 1.61 inches. It carries FDA compliance and meets NSF/ANSI 51 certification, making it appropriate for food-equipment and potable-water-adjacent fluid-handling applications. Licensed plumbers, refrigeration technicians, and equipment service technicians are the typical installers.

This connector is well suited for low-pressure fluid transfer lines in commercial food service equipment, beverage dispensing systems, water filtration assemblies, and similar light industrial or process plumbing applications where flexible tubing must be joined at a size transition. The fitting handles a working pressure of up to 125 psi and a temperature range of 0 degrees F to 212 degrees F, covering most ambient and moderate hot-water service conditions. Its black polypropylene body resists common cleaning chemicals encountered in food-service environments.

Key Features

• Reduces from 3/8-inch to 1/4-inch tube ID in a single straight union body
• Polypropylene construction resists corrosion and common chemical cleaners
• Rated to 125 psi maximum working pressure
• Temperature range: 0 degrees F to 212 degrees F for broad service compatibility
• FDA compliant and NSF/ANSI 51 certified for food-equipment fluid contact
• Single-barb design locks onto flexible tubing without additional hardware

Compatibility

Designed as an OEM-style replacement or service fitting for flexible tubing systems using 3/8-inch and 1/4-inch inside-diameter hose or tubing in food service, beverage, water filtration, and light industrial fluid-handling assemblies.

Installation Notes

Installation is performed by licensed plumbers or qualified equipment service technicians. Depressurize and drain the fluid system fully before disconnecting or installing any barbed fitting. Push flexible tubing firmly over each barb until the tubing seats past the barb ridge; use a hose clamp where vibration or elevated pressure is present. Verify that the tubing inside diameter matches the specified barb size before assembly to ensure a leak-free connection.