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The LEGEND VALVE 313-174 is a 3/4 inch CTS compression x 3/4 inch FIP coupling adapter designed for water service connections in residential and light commercial plumbing systems. This fitting transitions a compression-style copper tubing connection to a female iron pipe threaded end, making it a practical solution where tubing meets threaded pipe or valve assemblies. The compression end accepts standard CTS tubing with a ring-style compression mechanism, eliminating the need for soldering at that joint. Licensed plumbers and water service technicians install this type of adapter during meter sets, service line connections, and valve replacements.
This adapter is suited for water service applications where copper tubing in the ground or at the meter must connect to a threaded fitting, valve, or manifold. Typical installations include residential water service entries, meter pit connections, and supply shutoff configurations. The fitting is sold individually and is also available by the carton (12 per carton) or case (72 per case) for contractors stocking for multiple jobs.
Designed as an OEM-style water service compression-to-FIP adapter for use with 3/4 inch CTS copper tubing and standard 3/4 inch female iron pipe threaded connections in potable water service systems.
Installation of this fitting is typically performed by a licensed plumber in accordance with local plumbing codes and IPC guidelines. Shut off the water supply and relieve line pressure completely before making any connections. Ensure the copper tubing end is cut square and deburred before inserting into the compression fitting to achieve a proper seal. Do not overtighten the compression nut by hand or with tools beyond hand-snug plus one additional quarter turn without verifying tubing seating.
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