Water closet tank flush valve

A flush valve extension assembly for use in a water closet having a tank for holding water to be conveyed through a drain tube to a bowl by activation of an existing flush valve having a flexible flush valve member adapted to seat on an existing valve seat on said drain tube, said flexible flush valve member being pivotally attached to an overflow tube positioned in the tank, said flush valve extension assembly comprising:

• (a) a tube assembly having formed therein a channel for receiving a flexible strap member, said assembly including a shoulder member extending outward from an outer surface of said tube assembly in a position to divide said tube assembly into an upper section above said shoulder member, and a lower section below said shoulder member, said upper section being of a predetermined length and having a valve seat formed at the upper end thereof, said lower section being dimensioned to be received within said existing drain tube so as to allow said shoulder member to seat on said existing valve seat;
• (b) a gasket fittable about the outer surface of said lower section in a position to form a water tight seal between said shoulder member and said existing flush valve seat;
• and
• (c) a flexible strap having opposite ends connectable to one another in a plurality of selectable positions so as to form a loop, said loop having a portion thereof confined in said channel and a portion thereof extending around said overflow tube in order to retain said tube assembly on said drain tube.