A water safety valve, system and method for detecting and shutting off water flow due to leaks or breaks in a water line in which the water flow is at a very low rate on the order of three to five fluid ounces per minute but having the capability of passing large flows of three hundred to five hundred...http://www.google.fr/patents/US5503175?utm_source=gb-gplus-shareBrevet US5503175 - Water safety system
