Parker 325HB-4-4N Barbed Tube Male Connector 1/4 in Npt

Product Description

The PARKER 325HB-4-4N is a single-barb male connector designed to join 1/4-inch ID flexible tubing to a 1/4-inch NPT male threaded port. Molded from white nylon, this fitting is rated for working pressures up to 125 psi and operates across a temperature range of -40 degrees F to 200 degrees F. At 1.6 inches in overall length, it fits in tight plumbing and fluid-handling assemblies. The barb configuration creates a secure grip on soft tubing without clamps in low-pressure applications, though clamps are recommended for higher-pressure or vibration-prone lines. Licensed plumbers, HVAC technicians, and food-equipment service professionals install this type of fitting.

This connector suits residential and light commercial fluid-handling systems where a threaded port must transition to flexible barbed tubing. Common applications include water treatment equipment, food and beverage dispensing lines, ice makers, and similar systems where FDA-compliant and NSF/ANSI 51-listed materials are required. The nylon construction resists corrosion and is compatible with many non-aggressive water-based media. It is not intended for use with petroleum-based fluids, solvents, or compressed gases unless compatibility is independently verified.

Key Features

• Single-barb design grips 1/4-inch ID flexible tubing securely
• 1/4-inch NPT male thread for connection to standard threaded ports
• Nylon construction resists corrosion in water-based applications
• Rated to 125 psi working pressure
• FDA compliant and NSF/ANSI 51 listed for food-zone fluid contact
• Wide service temperature range: -40 degrees F to 200 degrees F

Compatibility

Designed as an OEM-style replacement or new-installation fitting for plumbing and fluid-handling assemblies that require a 1/4-inch NPT male-to-barb transition with FDA-compliant, NSF/ANSI 51-listed nylon construction.

Installation Notes

Installation is typically performed by a licensed plumber or qualified service technician. Shut off the water supply and relieve line pressure before removing or installing any fittings. Apply thread sealant tape or paste rated for NPT threads to the male threads before assembly; do not over-tighten, as nylon fittings can crack under excessive torque. Confirm tubing material and wall thickness compatibility before securing the barb connection, and use a clamp where system pressure or vibration could dislodge the tubing.