Patent ID: 6510563
Filing Date: 2003-01-28
Classification: E03D

Abstract:
In a toilet flush tank including a discharge valve having an externally threaded first lower tubular section mounted in a tank outlet in a tank bottom wall and secured therein with a collar threaded onto the first lower tubular section outside the bottom wall, a first flapper valve mounted to selectively open an upper end of the first lower tubular section immediately above the tank bottom wall and aligned axially with the tank outlet for discharge of substantially all water in the tank, a first upper tubular section offset laterally with respect to and having a lower end in fluid communication with the upper end of the first lower tubular section and an open upper end having secured therein a lower end of an upwardly extending standpipe, a dual level flush adapter insertable between the discharge valve and the tank outlet after removal of said discharge valve, said adapter comprising:an externally threaded second lower tubular section having a construction identical to said first lower tubular section, mounted in the tank outlet and secured therein with the collar in place of the first lower tubular section of said discharge valve and to provide for discharge of substantially all water in the tank, a second flapper valve mounted to selectively open an upper end of the second lower tubular section immediately above the tank bottom wall and aligned axially with the tank outlet in direct functional and positional replacement of said first lower tubular section and first flapper valve; a second upper tubular section offset laterally with respect to and having a lower end in fluid communication with the upper end of said second lower tubular section and an internally threaded open upper end sized to receive the externally threaded first lower tubular section of said discharge valve to position said first flapper valve at a selected level above said second flapper valve, whereby the volume of water discharged through said first flapper valve is adjustable.