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.