Patent ID: 7306008
Filing Date: 2007-12-11
Classification: F17D,G01M,Y10T

Abstract:
1. A system for protecting a home or business building from flooding caused by a leak or rupture in the building plumbing and for prompt detection of a leak or rupture in the plumbing system or water using appliances when the main water supply is disconnected from the building plumbing comprising an electrically controlled shut-off water valve connected between the main water supply to said building and the building plumbing, said water valve having a fail safe shut mode when no electrical power is supplied to said valve so that no water from said main water supply is supplied to said building plumbing when no electrical power is delivered to said valve, a low voltage network in said building connected to substantially all of the water using appliances in said building, said network being engaged whenever a water using appliance connected to said building plumbing demands a flow of water from said main water supply, said low voltage network coupled to said electrically controlled water valve so that said normally closed valve is opened, upon demand from a water using appliance, and allow delivery of water from said main water supply to said water demanding appliance, a water pressure sensor connected in said building plumbing for detecting a change in pressure of the water in said plumbing during periods of time that said water valve shuts off the water main from said building plumbing an alarm, said water pressure sensor coupled to said alarm when a predetermined change in water pressure is detected, and a timer preset to a predetermined timer interval, said timer responsive to water demand at a faucet or appliance and coupled to open said circuit to said water valve at the end of said predetermined timer interval unless the faucet or appliance demanding water has been turned off during said timed interval.