Convert almost any toilet into a dual flush toilet in minutes with the FLUIDMASTER Pro series dual flush retrofit kit the dual flush retrofit kit snaps into any 2 inch flapper flush valve for quick and easy installation and adjustment without removing the tank the durable silicone seal eliminates the need for frequent flapper replacements the special lever snaps in easily and provides the user the option of flushing "up" for liquid waste and "down" for solid waste the special cable activation eliminates chain tangles and hang-ups and the specially calibrated Pro fill valve ensures consistent flushes every time.