Step 6 · Restore Water and Test Flush

Slowly turn the water shut-off valve counter-clockwise to restore the water supply to the toilet. The tank will begin to fill. Watch the new flapper as the water rises to ensure it's seated correctly and no water is visibly leaking from the seal. Once the tank is full, listen carefully. You should not hear any water running. Now, perform a test flush. The toilet should flush with full power, and the flapper should drop back down and create a tight seal once the water has drained from the tank. After the tank refills again, wait a minute and listen to confirm the running has stopped. If all is quiet and the flush is strong, the replacement is complete. Carefully place the tank lid back on top of the tank.

Tools and Materials

Water