Parker 322HB-6-4N Barbed Tube Union Connector 3/8x1/4

Product Description

The PARKER 322HB-6-4N is a single-barb tube union connector designed to join two flexible tubes of different inside diameters in a single inline fitting. Molded from white nylon, this connector accepts a 3/8-inch tube ID on one end and a 1/4-inch tube ID on the other, with corresponding tube outside diameters of 0.43 inches and 0.31 inches. It carries an overall length of 1.61 inches and is rated for working pressures up to 125 psi. The fitting meets FDA compliance and NSF/ANSI 51 certification, making it appropriate for food-equipment and potable-water-adjacent fluid-handling applications. Plumbers, HVAC technicians, and food-service equipment technicians are the primary installers.

This fitting is used in low-pressure fluid transfer lines where two tubes of differing diameters must be connected without threaded fittings or clamps. Typical applications include food and beverage dispensing equipment, water purification systems, laboratory fluid lines, and light-duty HVAC condensate or tubing runs. The nylon construction tolerates a wide service temperature range of -40 degrees F to 200 degrees F, making it suitable for both refrigerated and warm-process environments. Its push-on barbed design allows fast assembly in tight equipment enclosures.

Key Features

• Single-barb union connector joins 3/8-inch and 1/4-inch tube IDs in one fitting
• Nylon construction rated from -40 degrees F to 200 degrees F (-40 degrees C to 93.3 degrees C)
• Maximum working pressure of 125 psi
• FDA compliant and NSF/ANSI 51 certified for food-equipment fluid contact
• Compact 1.61-inch overall length suits tight equipment cabinets and panels
• White color for easy visual identification in multi-line installations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for flexible tubing systems requiring an inline reducer union in food-service equipment, water treatment assemblies, or similar low-pressure fluid-handling systems.

Installation Notes

This fitting is typically installed by plumbers or equipment technicians working on low-pressure fluid lines. Shut off fluid supply and relieve system pressure before disconnecting existing tubing or inserting the fitting. Ensure tube ends are cut cleanly and squarely before seating onto the barbs to maintain a leak-free connection. Verify that tubing material is compatible with nylon fittings and that system operating pressure does not exceed the 125 psi rating.