204 and bowl 202 through filler valve 220 stopper 32 is provided on shaft 14 to limit the movement of knob 12 when the overflow problem has been addressed knob 12 may be pushed in the direction of arrow b to allow filler float 218 to fall back to the refill position with float lever arm 223 on low guide section 20 allowing tank 204 and bowl 202 to be filled then as normal filler float 218 may rise with the level of water in water tank 204 to the shut off position with reference to fig7 u2013 9 it should be appreciated that control mechanism 10 may be retrofit to existing toilets the flush mechanisms such as mechanisms 106 206 may be removed and replaced by a kit 300 providing a knob 12 shaft 14 formable shaft 18 stopper 32 clip 36 and chain 38 of the control mechanism 10 just described the kit 300 further includes a flush handle 308 with a bore 26 extending through a threaded section 342 and having a flat surface 30 to interact with the flat surface 28 of shaft 14 lever arm 310 is provided extending from threaded section 342 threads 44 on shaft 14 engage threads 46 in knob 12 the old flush mechanism is removed and replaced by kit 300 it should now be appreciated that formable shaft 18 is formable so that it may be shaped to provide an appropriate low.