Abstract: A flush valve construction for water closets, urinals, showers and the like including a cylindrical jacket and associated piston assembly. A stop is adapted to be seated in the fluid supply line which will achieve flow adjustment and also render the valve inoperative and thereby permit repairs to the construction. The shaft supporting this stop is threaded and a nut is mounted thereon. This nut is positioned for engagement with the end of the valve piston to thereby control the stroke of the piston. This enables the saving of water by preventing an undue volume of water from passing through the valve during each operating cycle.

Abstract: A flush valve construction consists of a jacket and piston assembly for controlling fluid flow. An integral metering passage stop and vacuum breaker are associated with the piston assembly for controlling the operation of the valve. Operable means are adapted for displacement of the piston assembly and adjustment of the stop. Repair and adjustments can be made without disturbing associated plumbing.