Mansfield Flush Valve Stop Cap 225-5907
Colors vary. This is the part that screws on top of the flush valve and keeps
the flush tower from rising too high. Fits 208, 209, 210 & 211 Flush Valves. When it is broken the flush valve
can get hung on it preventing the tower from falling back down to close
the valve. Many times when this part is broken it happens because the
toilet is hard to flush and replacing the flush valve seal will make it
easier to flush.