New Floodstop Washing Machine Valve Shutoff Kit FS3/4H v4 (Lead free) Inline Valves Each FloodStop valve is screwed onto the hot and cold water hose bibs Water/leak sensor is placed on the floor behind Washing Machine Valves stay open until water loss is detected Water on sensor immediately closes FloodStop valves and sounds alarm Certified lead free under S. 3874, AB1953