How to Replace a Leaky Toilet Valve

There is nothing worse than sitting in your home listening to the steady running or maddening drip of your toilet caused by a malfunctioning ball-cock (toilet valve). Not only will the noise drive you crazy in the middle of the night, but the extra cost for all that wasted water can soon become outrageous. The good news is that even the most inexperienced home handyman can replace the flapper valve and ball-cock in about 20 minutes.

  • Common Reasons to Replace the Entire Assembly
  • Your toilet tank doesn’t fill after use
  • Your toilet runs (fills) continuously
  • The valve makes a humming or moaning noise
  • Your toilet won’t flush

Replacing the Toilet Valve

Toilet valve kits can be found in most department stores, hardware stores, and discount home building supply stores. The kits have everything you need to completely replace the float valve and the flapper valve. So, now that you have the kit on hand, let’s get started replacing your old leaky toilet valve.

Removing the Old Valve

  1. Turn off the water supply to the toilet. There should be a valve on the water line by the toilet.
  2. Flush the toilet to drain all the water out of the tank.
  3. Remove the float ball from the brass rod coming out of the float valve and set it aside.
  4. Dry up any remaining water in the tank.
  5. Pull the small refill tube out of the overflow pipe.
  6. Unhook the flapper valve chain from the tank lever.
  7. Remove the old flapper valve from the tank.
  8. Disconnect the water supply line from the float valve.
  9. Remove the nut from the float valve that holds it in place.
  10. Remove the old float valve and wipe the inside of the tank clean.

Installing the New Valve

  1. Install the new float valve so that the overflow tube is oriented towards the overflow tube.
  2. Holding the float valve in place on the inside of the tank, install the securing nut on the outside. Hand tighten only so you don’t break the tank. 13. Install the water line, but don’t turn it on yet.
  3. Connect the refill tube to the valve and secure it inside the overflow pipe.
  4. Install the new flapper valve and connect the chain to the toilet handle lever.

Once you have verified that the flapper valve closes fully and seals off the tank, it’s time to turn on the water and ensure you have no leaks. Install the float ball back on the arm. Now is a good time to check the water level in your tank. If you find you are not getting enough water or are getting too much water, now is a good time to adjust it. Some of the newer toilet valves no longer use a float ball and arm, they have everything built into the valve itself. However, the kit should have instructions regarding how to adjust the water level.

It will probably take you less time to replace your leaky toilet valve than it did for me to write this. But now you can rest easy at night without having to listen to a noisy toilet valve and worrying about your water bill.