Abstract: A backwashable filtering device comprising a housing, a main filter in the housing, an inlet for receiving liquid into the housing and an outlet for discharging liquid from the housing. A rotatably mounted spraying member is disposed in the main filter which is preferably cylindrical in shape for receiving liquid and discharging it against the inner surface of the filter to backwash and cleanse the filter. Filtering passage is defined in the housing between the inlet and the outlet for directing water against an outer surface of the main filter for the purpose of filtering the water. Valves are provided in the housing associated with the main filter for selectively directing liquid toward the opposite sides of the main filter for the purposes of filtering and backwashing respectively.

Abstract: A thermostatic radiator valve has a spring loaded thermostat located in a rotatable member with the spring bearing against the thermostat and the rotatable member, the latter having arms surrounding the thermostat, the free end of each arm having a radially inwardly projecting extension which bears against the loading spring.

Abstract: A valve structure has a body with an inlet, an outlet and an intermediate by pass aperture. A pair of identical check valves are located in the body, one to each side of the aperture. The check valve nearest the inlet has a slidable housing, movable to cover the aperture, biased away from the fixed housing of the second check valve by a spring. The check valves are closable by individual springs in the direction of the inlet but the individual springs are stronger than the spring separating the housings.