Seal Gasket Fit for TOTO Aquia Toilets Fit for TOTO ST464M 412M 413M 416M, Replace 9BU064E (Grey)

Installation steps: 1) Turn off the water supply to the toilet 2) Slide out the top water inlet pipe 3) Turn the flush assembly counterclockwise and lift up 4) Turn it over and replace the bottom gasket by removing the locking washer 5) Install the new gasket and reposition the locking washer 6) Place the flush assembly into the flush hole and turn it clockwise until it locks into place and the water access point is aligned with the water pipe 7) Reconnect the top water inlet pipe 8) Turn on the water and flush to test if everything is working properly, replace the cover