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The NIBCO INC W01250D is a 3/4 x 1 inch copper-by-male (CxM) adapter designed to transition a solder cup connection to a male NPT threaded connection. The fitting features a standard solder cup on one end and a male NPT thread on the other, allowing a soldered copper line to tie into a threaded pipe, valve, or equipment port. Manufactured to be lead-free, this adapter meets potable water requirements. It is a field staple for licensed plumbers working on residential and light commercial water distribution systems where copper piping meets threaded iron, brass, or bronze components.
This adapter is used wherever a copper sweat connection must terminate at a male NPT thread. Typical applications include connecting copper supply lines to threaded gate valves, ball valves, water heaters, pressure regulators, and other threaded end-connections. The fitting is sold individually and is suited for plumbing rough-in, retrofit, and repair work in both new construction and service scenarios. Its lead-free construction makes it appropriate for potable domestic water systems where lead-free compliance is required by code.
Designed as an OEM-style replacement or new-installation copper CxM adapter for residential and commercial potable water and general plumbing piping systems using copper tubing and NPT-threaded components.
Installation is performed by a licensed plumber. Shut off the water supply and relieve system pressure before beginning work. The solder cup end requires standard sweat-soldering technique using appropriate flux and lead-free solder per local plumbing code. Thread the male NPT end into the receiving fitting using thread sealant tape or compound rated for the service; do not overtighten, as this is a brass-type fitting subject to thread damage from excessive torque.
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