Tankless Isolation Valve Kit, Use To Isolate A Tankless Water Heater For Service & Are Required In Most Installations, Includes: Two 3/4" Female Thread & One 1/4" Turn Operation Ball Valves, 1 Connects To Cold Water Inlet & 1 Valve Connects To Hot Water Outlet, Each Valve Includes A Side Inlet Ball Valve With 3/4" Male Hose Thread Connection, Low Lead California Compliant, 600 LB WOG Rating, Non-Shock, Ab1953 Certified.