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The WILLIAMS COMFORT PRODUCTS 8R38DM is a 3/8 inch NPTF male regular speed coupler designed for use in fluid and pneumatic line connections across HVAC, plumbing, and related mechanical systems. The male NPTF thread ensures a pressure-tight, dryseal connection without the need for additional sealant tape in most applications. Weighing 0.401 pounds, this is a compact, single-piece fitting sold individually. It is typically installed by licensed HVAC technicians, plumbers, or mechanical contractors working on service lines requiring a quick-disconnect or inline coupling solution.
This coupler is suited for residential and light commercial applications where a 3/8 inch NPTF male connection is required. It is commonly used on service manifolds, refrigerant lines, compressed air lines, or other fluid transfer systems that call for a regular speed coupler fitting. The male thread configuration allows it to mate with a corresponding female coupler body or port.
Designed as an OEM-style replacement or service fitting for systems requiring a 3/8 inch NPTF male regular speed coupler connection.
Installation should be performed by a qualified HVAC technician, plumber, or mechanical contractor. Before installation, depressurize and isolate the line fully to prevent injury or system damage. NPTF dryseal threads are designed to seal on the threads themselves, but verify joint integrity after assembly per applicable service procedures. Follow all applicable local mechanical codes and manufacturer guidelines for the connected system.
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