The NIBCO PRO-Stop straight supply stop valve has 1/2-inch PEX on one end and 1/2-inch MIP threads on the other. The stop valve is easily installed using NIBCO stainless steel clamps or copper crimp ring system. The PRO-Stop straight supply stop valve features a blow-out proof stem and O-ring seal. It has an oversized chrome-plated handle with a ribbed surface for ease of operation and gripping. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. NIBCO PEX systems provide a safe, economical and energy-efficient piping alternative for water distribution, radiant floor heating, municipal water supply, geothermal climate control, snow melt and drip irrigation. NIBCO PEX tubing, fittings, valves, and manifolds are designed to be used as a complete system, and are backed by a NIBCO INC. limited warranty.