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The NIBCO INC W01880T is a 1-1/4-inch copper sweat tube cap designed to permanently seal the open end of a copper pipe or tube. It features a solder cup connection, allowing the fitting to be soldered directly over the pipe end for a leak-tight closure. This fitting is lead-free, meeting the requirements of potable water installations. Plumbers and pipefitters use this cap in residential and light commercial plumbing systems wherever a supply line, branch, or stub-out needs to be closed off cleanly and permanently.
This tube cap is suited for use in domestic water supply systems, hydronic heating lines, and general copper piping applications where a reliable end closure is required. It is appropriate for new construction, system modifications, and repair work. The sweat-style connection makes it compatible with standard copper tubing and is installed using common soldering tools and flux. Each unit is sold individually (unit of measure: EA), with a package quantity of 5 available.
Designed as an OEM-style replacement and standard-fit cap for 1-1/4-inch nominal copper tubing in sweat (solder) connection applications. Also referenced under fitting designation U617.
Installation is performed by a licensed plumber using standard copper soldering tools, flux, and lead-free solder. Shut off the water supply and fully drain the line before soldering to ensure a dry, clean joint. Clean the pipe end and cup interior with emery cloth or a pipe cleaning brush before applying flux. Applicable work must comply with local plumbing codes and the International Plumbing Code (IPC) as adopted in the jurisdiction.
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