Flush tank water saver

Claim 1

For use in a toilet water closet tank which includes therein means for establishing and maintaining a predetermined hydrostatic head of water in the tank after each flushing operation of the toilet and a valve-controlled opening in the bottom of the tank for toilet flushing discharge of the water therefrom, a water-saving means comprising a pair of weir-like baffle members adjustably fixedly positionable in the water tank in embracing relation to said discharge opening to form in the tank an open-topped water-tight well extending upwardly from the bottom of the tank to a height substantially below the level of the water normally contained in the tank for maintenance of the hydrostatic head required for flushing operation of the toilet, each said member being of an overall length greater than the distance between the front and back walls of the tank and sufficiently flexible lengthwise to permit it to be sprung into bowed form between said walls with its opposite side edges respectively in engagement therewith, the opposite side edges of said members each having a pair of angularly related flanges of water-impervious flexible material extending along the full length thereof, said flanges being adapted to be expanded into substantially coplanar relation to provide for each edge of the member a relatively broad water-tight area of non-slipping contact with the surface of the tank wall engaged thereby.