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The NDL INDUSTRIES W1163 is a copper male adapter designed to connect a copper sweat (C) end to a male pipe thread (MPT) fitting. With a 1-1/8-inch copper sweat end and a 1-inch male pipe thread end, this adapter transitions between soldered copper tubing and threaded pipe connections. It is a standard fitting used in plumbing, hydronic heating, and mechanical systems wherever a copper line meets a threaded fitting or valve. Licensed plumbers and pipefitters install this adapter as part of rough-in work, equipment connections, and system modifications.
This adapter is suited for residential and light commercial plumbing applications where copper tubing must terminate at a threaded connection point. Common scenarios include connecting copper supply lines to threaded valves, manifolds, or equipment ports. The C x MPT configuration means the copper end accepts a standard sweat solder joint, while the male threaded end screws into a female-threaded fitting or valve body. It is sold in a box quantity of 25, making it practical for contractors stocking common fittings for multiple jobs.
Designed as an OEM-style replacement and standard-use fitting for copper plumbing systems requiring a transition from a 1-1/8-inch copper sweat connection to a 1-inch male pipe thread connection.
Installation is performed by a licensed plumber or qualified pipefitter. Shut off the water supply and relieve system pressure before making any connections. The copper sweat end requires proper flux application and soldering to the copper tubing per standard trade practice and applicable plumbing codes such as the IPC. The male pipe thread end should be wrapped with thread sealant tape or pipe dope before threading into the female fitting to ensure a leak-free joint.
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