Project Guide

How to Repair a Leaking Toilet Tank

1
PREP WORK AREA AND DRAIN TOILET
Prep work drain toilet - Repair Leaking Toilet Tank
  • Before you get started, inspect the area where you will be working and have a bucket on hand to catch water.
  • Turn off the water supply valve and flush the toilet.
  • Disconnect the supply line from the tank and sponge the inside of the tank until it's dry.
2
REPLACING A FILL VALVE
Replacing a fill valve - Repair Leaking Toilet Tank
  • Remove the fill valve using two adjustable wrenches.
  • Take it with you to your local Home Depot store so you’ll be sure to get the right part.
  • If you’re not replacing other parts, install the new fill valve and gasket. See our project guide on Installing a Fill Valve for details. Turn on the supply line and check for leaks. If necessary, tighten a quarter turn.
3
REPLACING TOILET GASKETS
Replacing toilet gaskets - Repair Leaking Toilet Tank
  • Remove the tank bolt with a screwdriver and adjustable wrench.
  • Clean the bolt and nut with white vinegar and a small wire brush.
  • If you aren't replacing the spud washer, reinstall bolts and nuts with new gaskets. Alternate the tightening of the nuts to evenly draw the tank tight.
  • If you are replacing the spud washer, continue to Step 4.
4
REMOVING THE TOILET TANK
Removing the toilet tank - Repair Leaking Toilet Tank
  • Lift the tank straight up and off the toilet base and set it upside down on the floor on an old towel or rug.
  • Make sure you have a helper -- toilet tanks are usually in an awkward place and are heavier than they appear.
5
REPLACING THE SPUD WASHER
Replacing the spud washer - Repair Leaking Toilet Tank
  • Remove the spud washer and take it with you to your local Home Depot to find the right replacement.
  • Install the new spud washer over the flush valve tailpiece and place the toilet tank back on the base.
  • Reinstall the tank bolts, gaskets and nuts, alternately tightening the nuts from side to side so they tighten evenly