Parker 322HB-8-4N Barbed Tube Union Connector 1/2x1/4

Product Description

The PARKER 322HB-8-4N is a single-barb tube union connector designed to join two lengths of flexible tubing with different inside diameters in a single inline fitting. Molded from nylon and finished in white, this union connector accommodates a 1/2-inch barb on one end and a 1/4-inch barb on the other, making it suited for stepped-diameter tubing runs in fluid-handling systems. It carries FDA Compliant and NSF/ANSI 51 certifications, confirming suitability for food-equipment and food-zone fluid contact applications. Maximum working pressure is 125 psi, and the operating temperature range spans -40 degrees F to 200 degrees F.

This fitting is used in commercial food service equipment, beverage dispensing systems, ice machines, and other food-contact fluid circuits where a reducer union is needed between mismatched tubing sizes. Plumbers and equipment service technicians install it in low-pressure water and fluid lines requiring a reliable push-and-seat barb connection without additional hardware. Its compact overall length of 1.73 inches makes it practical in tight equipment enclosures.

Key Features

• Single-barb union design connects 1/2-inch ID tubing on one side to 1/4-inch ID tubing on the other
• FDA Compliant and NSF/ANSI 51 certified for use in food-contact and food-equipment fluid systems
• Nylon construction handles a temperature range from -40 degrees F to 200 degrees F
• Rated to 125 psi maximum working pressure
• Compact 1.73-inch overall length fits in confined equipment spaces
• White color provides quick visual identification in multi-line installations

Compatibility

Designed for use with flexible tubing having a 1/2-inch inside diameter on one port and a 1/4-inch inside diameter on the other port, with corresponding outside diameters of 0.55 inches and 0.31 inches respectively. Suitable for low-pressure water and fluid lines in food service and beverage equipment applications.

Installation Notes

Installation is performed by plumbers or equipment service technicians familiar with barbed fitting assembly. Shut off and depressurize the fluid circuit before disconnecting or connecting any tubing. Push tubing firmly over each barb to achieve a full seat; using a barb-compatible clamp or tie wrap is standard practice on pressurized lines to prevent pull-off. Verify tubing inside diameter matches the barb size on each end before assembly, and confirm the fluid and temperature conditions fall within the rated limits of this fitting.