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

Product Description

The PARKER 325HB-4-4PP 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 polypropylene, this fitting is rated for pressures up to 125 psi and a maximum working temperature of 212 degrees F, making it suitable for a wide range of fluid transfer applications. The single-barb design provides a secure grip on tubing without requiring additional tools, and the fitting meets FDA and NSF/ANSI 51 standards for food-zone and potable-water-adjacent service. Plumbers, HVAC technicians, and pool service professionals install this fitting where a barbed-to-threaded transition is needed in low-pressure fluid lines.

This connector is commonly used in residential and light commercial plumbing, HVAC condensate drainage, water treatment, beverage dispensing, and pool and spa equipment where 1/4-inch flexible tubing terminates at an NPT-threaded port. Its polypropylene construction resists corrosion and many common chemicals encountered in these trade applications. The black color provides easy visual identification during installation and inspection.

Key Features

• Single-barb design secures 1/4-inch ID tubing with 0.31-inch OD without clamps in low-pressure service
• 1/4-inch NPT male thread provides a standard threaded connection to ports and fittings
• Polypropylene construction offers corrosion resistance and chemical compatibility for fluid transfer lines
• Rated to 125 psi maximum working pressure
• Operating temperature range of 0 degrees F to 212 degrees F
• FDA Compliant and NSF/ANSI 51 certified for food equipment and potable water contact applications

Compatibility

Designed for use with flexible tubing having a 1/4-inch inside diameter and a 0.31-inch outside diameter, connecting to any standard 1/4-inch NPT female-threaded port.

Installation Notes

This fitting is installed by licensed plumbers, HVAC technicians, or qualified service professionals working on fluid transfer systems. Shut off fluid supply and depressurize the line before installation. Hand-thread the NPT connection until snug, then use a wrench for final tightening — avoid over-tightening polypropylene threads, as the material can crack under excessive torque. Push tubing firmly onto the barb until it seats fully against the fitting body, and confirm a leak-free connection before returning the system to service.