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The PARKER 372HB-3-4N is a barbed male branch tee fitting designed to split or branch a fluid or air line in low-pressure tubing systems. Molded from nylon, this white fitting accepts 3/16 inch barbed tubing connections and features a 1/4 inch NPT male thread for direct connection to a ported manifold, valve body, or threaded port. The branch tee configuration allows one inlet to feed two outlets, or two inlets to converge at a single threaded port, depending on installation orientation. It is a standard choice for routing pneumatic or liquid lines in HVAC controls, refrigeration equipment, and light industrial fluid systems.
This fitting is suited for residential and light commercial applications where flexible tubing must be branched off a threaded component. Typical use cases include pneumatic control tubing, condensate or drain line splits, and low-pressure fluid distribution in HVAC control panels and equipment enclosures. The nylon construction resists corrosion and is compatible with a range of water-based and air-based media. Installation is common in HVAC and plumbing service work wherever tubing-to-thread transitions and line splits are required in a single compact fitting.
Designed as an OEM-style replacement or service fitting for low-pressure pneumatic and fluid tubing systems using 3/16 inch barbed tubing and 1/4 inch NPT threaded ports.
Install and remove tubing connections only after depressurizing the system and isolating the affected line. Apply appropriate thread sealant to the NPT male threads before engaging the fitting; do not overtighten, as nylon threads can crack under excessive torque. Barbed connections should be secured with clamps or ties where vibration or pressure cycling is present. Follow applicable mechanical and plumbing codes for the system type being serviced.
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