Patent ID: 6374848
Filing Date: 2002-04-23
Classification: E03B,F16K,Y10T

Abstract:
An automatic water drain mechanism operative at low ambient temperature to cut-off water flow in a main water supply line of a building, comprising:a valve housing, said valve housing having a water inlet and a water outlet, said housing being divided into first and second compartments; a valve disposed in said first compartment of said valve housing, which is movable between a first position maintaining water flow from said water inlet to said water outlet and a second position cutting-off such water flow; means for biasing said valve in a direction of movement toward said second position; means for preventing said biasing means from biasingly moving said valve to said second position; means for sensing ambient air temperature disposed in said second compartment of said valve housing; and bellow means responsive to said ambient temperature sensing means for deactivating said preventing means at substantially 32Â° Fahrenheit and therewith rendering said biasing means operative for biasing said valve to said second position.