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The ELKHART PRODUCTS WP4-02 is a 1/8-inch WROT copper male adapter designed for sweat-solder copper-to-male-thread transitions in plumbing and HVAC piping systems. The fitting connects a copper tube end (C) to a male NPT thread (M), making it a standard transition piece for joining copper lines to threaded ports on valves, equipment, or fittings. Constructed from WROT copper, this adapter delivers the material integrity required for pressure and temperature conditions typical of residential and light commercial service work. At 0.019 pounds, it is a compact, lightweight fitting intended for 1/8-inch line sizes.
This adapter is used in plumbing, HVAC, and refrigeration piping applications where a 1/8-inch copper sweat connection must terminate at a male threaded fitting. Typical installations include gauge ports, service valve connections, and low-pressure sensing lines. Licensed plumbers and HVAC technicians are the primary installers. Its solder-joint construction makes it suitable for systems where a clean, permanent mechanical connection is required at small-diameter transition points.
Designed as an OEM-style replacement or new-installation fitting for 1/8-inch copper sweat-to-male-thread transition points in residential and light commercial plumbing and HVAC piping systems.
Installation is performed by a licensed plumber or HVAC technician using standard soldering tools including a torch, flux, and lead-free solder per applicable plumbing codes. Shut off and depressurize the line completely before cutting or fitting. Clean the copper tube end and fitting socket thoroughly before applying flux to ensure a sound solder joint. Follow local plumbing code and IPC requirements for solder alloy selection and joint inspection.
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