HSH-Flo Motorized Ball Valve with A Bilge Water Leak Alarm 3/4'' DN20 ,Valves Close Automatically When leakage, And Alarm 1. Limit Switches Inside, Cut Off Power Automatically When F.O or F.C; 2. Valves close automatically when leakage, And Alarm; 3. Lead Free, Best Item For Drink Water;Ambient temperature: -20 to 120 4. Price Include Controller and Valve; 5. When Power Low, Will Be Alarm;