Review on Fluidmaster 510A-001-P10 Blue Seal: Replacement Flush Valve for American Standard and Eljer Toilets by Devin Tanner

Not compatible with Champion 4. It is not possible to replace the flush valve seal without damaging the flush valve, therefore a new flush valve must be ordered and replaced. Any tutorial videos found are not applicable as they look similar, but the valve will need to be broken open to remove the old gasket. I only replaced the flush valve 5 years ago and have had the toilet for 9 years now. A bubble forms in the flush valve seal, causing leakage. This is the second time in 9 years that the same thing has been replaced with the same valve seal blister issue. The all-new flush valve is completely flat and bubble-free all around. It was badly designed. If this happens again I will replace the toilet with another brand.