The FlushAllâ„¢ will improve flushing power by as much as 40%. Create new toilet performance for your existing toilet. The funneling action accelerates water flow and increases flushing power. The FlushAllâ„¢ will also improve flush power while reducing water usage. The patented design will easily install in most standard toilet tanks. Includes a flush valve, gasket and tank to bowl bolts (K835-9 and K835-9BX only), the no cut overflow tube adjusts from 8-1/2 to 13 in.