You wouldn’t expect an auto mechanic to be able to fix a car without knowing the difference between a spark plug and an exhaust pipe. So we can’t expect you to be able to fix your toilet without knowing the difference between a fill valve and a flush valve.

Here is a diagram of a toilet tank with all of its major components and Fluidmaster parts identified for you.

NOTE: Some tanks may have unique fill and flushing systems installed.

Click here to identify the right valves for your toilet:

How to pick the right valves for your toilet