I Have Been Unsatisified With The Product We Have Had In This Toilet Over It's Life, The Most Satisfying Product Was The Old 400-A Filvalve Before This One. It Started To Loose It's Water Output After Being On For About 4 Minutes And Then Lost More After 6 Minutes. The Refil Tube Is Directed Into The Tank HISTORY OF THIS TOILETS INNERS: FILLVALVES: Original Fluidmaster 400 Model Ingenium Fillvalve (Lasted About 2 Years Before Sticking). Fluidmaster 400-A Fillvalve (1/2 Year, Slowfilling) Korky Quietfill Fillvalve (1 Month Don't Remember What Was Wrong With It) Fluidmaster 400-A Filllvalve ( 4 Years Started To Slowly Loose Water Pressure, 1/3 Of It After 4 Minutes, After 6 Lost Another 1/2.) Korky Quietfill Fillvalve (Present, Leaky Around Top Cap Since Purchase) FLAPPER VALVES Original Kohler Ingenium Flapper With Float (2 1/2 Years Before Leaking) Fluidmaster Bullseye Adjust A Flush Flapper (4 Years Before A Mild Leak, Shribbled And Ringed) Fluidmaster Bullseye Adjest A Flush Flapper (Present) The Other 1 Piece Kohler From 1993 Has Only Gone Through 2 Fillvalves And 3 Flappers. I Don't Know Why This Fillvalve Is Leaking (Poor Seal?), Wonder How Long This One Will Last. Not Any Quieter Than Fluidmaster's 400-A, Actually Noisier, But It Fills Up Twice As Fast And I Love That. NOTE: We Do Have Hard Water That Is Quite Heavily Clorinated, The 2 Enimies To Rubber Flappers. The Clorine Resistant Ones Seem To Last About Twice As Long.