a valve is provided having a housing with an inlet and an outlet . within the confines of the housing is a fluid flow path that allows for fluid communication between the inlet and the outlet . the valve includes a valve element that is movable to and from a position where it blocks fluid communication along the fluid flow path , thereby closing the valve . the valve also includes a resilient member provided in a chamber of the valve that is fluidly sealed from the fluid flow path . the resilient member urges the valve element to move to the position for closing the valve . when the pressure of fluid entering the inlet exceeds a preselected amount , the pressure of the fluid overcomes the urging of the resilient member and the valve element moves towards a position that allows fluid communication along the fluid flow path , thereby opening the valve .