The 1” MNPT × CTS Lead-Free Compression Valve is a water-service transition valve that combines flow control and pipe connection. It is designed to connect CTS-sized polyethylene or PEX service pipe to a male NPT threaded connection while providing a reliable shutoff point within the line. Commonly used in municipal, residential, and utility installations, this lead-free valve simplifies service line layouts by reducing the need for separate fittings and valves.