Patent ID: 6687923
Filing Date: 2004-02-10
Classification: F16K,Y10T

Abstract:
A vacuum release valve for positioning on a line between a pool suction inlet and a pump for pumping pool liquid from the inlet and along the line, the vacuum release valve including a valve member that is urged by the pump into a sealing position during normal pumping of pool liquid from the inlet to the pump and such that pool liquid does not flow through the vacuum release valve;wherein the vacuum release valve is adapted for location in an auxiliary line located laterally to the line extending between the inlet and pump such that, when pool liquid is drawn past the auxiliary line, the suction induced in the auxiliary line has the effect of drawing the valve member against the seat; wherein, when a predetermined level of vacuum is induced in the line, the valve member is moved out of the sealing position by the vacuum so that a fluid is allowed to flow through the vacuum release valve to release the vacuum; and wherein the seat is adapted to only allow the valve member to move therepast once the predetermined level of vacuum has been induced in the line, the seat being formed from a resilient but deformable material, which deforms as the member passes but restores to its former shape once the member has passed.