DON'T buy any AMERICAN STANDARD toilets (CHAMPION 4, CADET 3 and ETC.) that uses the cheaply made 3" flush valve that's made by WDI in China. Its seal bubbles up and flat rubber piece is warped because they use cheap rubber materials. WDI lies to American Standard all the time (I have people that are working for WDI said they DO NOT trust their own products). I wonder why American Standard switched to FluidMaster now.