... water leak stop alarm 4.widely used Water leakage protection 1). FeatureWater leak can cause large economic ... the OPEN button to open the valve. • Once leakage happens, when the water touch the water sensor, ... the alarm • After maintenance and all the leakage were repaired, press the OPEN button to open ... state • Keep the water sensor flat where water leakage may happen after sopping up the water, the ...