Is it necessary to drain the water in the tank before replacing the water on the toilet?

Hello, netizens! There are three scenarios for a leaky toilet:

1. The water leakage at the water inlet of the water tank, the water leaks to the toilet, the solution is to remove it to see if the rubber pad has been damaged, if no harm is found, you can try to change the direction of the rubber pad to install it. If it doesn't work, then you can only replace the rubber pad;

2. The rubber pad of the valve seat of the flush valve leaks and leaks into the toilet, and the method is the same as above;

3. The toilet is cracked, some slightly cracked, just a slight water seepage, the crack is not easy to see, the situation you said should be more serious, so the cracking is relatively rare, it should be a situation, because you did not mention the location of the water leakage, as soon as you know the location of the water leakage, you can judge the source of the problem. Hope it helps.

That is, the flush valve seat gasket is damaged and leaking (the black part in the picture), you need to take it out to see if you can adjust the deformation direction down to use, if not, you need to replace it.