Legend Valve 301-307 1-1/2" T-572 dielectric coupling

Legend Valve 301-307 dielectric union

The Legend Valve 301-307 is a 1-1/2" T-572 dielectric union designed for plumbing installations. It connects dissimilar metal piping to prevent galvanic corrosion in water supply systems. Professional plumbers and maintenance technicians use it on residential and commercial pipework where copper meets steel.

T-572 dielectric specification

The T-572 designation identifies the union's dielectric construction that electrically isolates joined metals. This single specification determines whether the fitting matches the pipe material and corrosion-protection requirements of the job. Without this rating the connection would allow electrolytic deterioration.

1-1/2 inch nominal pipe size

The union fits 1-1/2 inch nominal pipe threads and handles standard potable water pressures in that size range. It provides reliable service for hot and cold domestic supply lines up to typical residential flow demands. Larger diameter mains or high-pressure industrial loops exceed its intended capacity.