Step 1
Remove the water tank lid from the back top end of the toilet, and set the lid aside.
Step 2
Reconnect the flush valve chain back onto the trip lever if it is disconnected. Tug on the chain to make sure it is tight.
Step 3
Unhook the chain again if there is too much slack and hook the chain back onto a shorter link.
Step 4
Move the valve seal at the bottom of the tank, connected to the valve chain, so that it fits into place.
Step 5
Place the lid back onto the water tank. Flush the toilet to make sure it fully flushes.