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Common Toilet LeaksWater

ToiletIt's estimated that 20 percent of all toilets leak. Even if you can't hear the leak, you could be losing up to 300 gallons of water every day!

Silent Flapper Leaks:

  1. Put a few drops of  food coloring in the tank or pick up free dye tabs from 630 Garden St, Public Works counter
  2. Wait 15 minutes without flushing
  3. If you see color appear in the toilet bowl, you probably have a flapper leak. To fix flapper leaks, follow these directions.

Running at Night:

Many toilets in Santa Barbara leak overnight when the water pressure rises. This happens when the water level in the toilet tank rises above the overflow tube and runs down the tube constantly.

  1. Remove your tank lid and observe the water level. If you are doing this in the middle of the night you should visibly see the water going over, or close to it. You can also sometimes see water lines in the tank where the water has risen.
  2. If the water is higher than one inch below the overflow tube, it most likely runs at night.
  3. Adjust it down depending on your toilet type. First, give the toilet a half-flush to empty part of the tank and make adjustments easier:
    • If you have a floating ball: adjust the screw on the top of the fill valve mechanism (turn clockwise) to lower the ball.
    • If you have a floating cylinder: adjust the "V" shaped clip on the stiff wire link (slide it down) to lower the cylinder.
  1. Flush (full flush) again once adjusted to see where the water level rises to.
  2. The following day, check the water level. Adjust as needed.

Faulty Ballcock or Valve:

  1. To repair/adjust a ballcock with a float ball: Gently pull up on the float ball rod. If the water shuts off, the float ball is the problem. It may have water in it, or may be set too high. Unscrew the ball. If it has water in it, replace it.
  2. If there's no water in the ball, the rod needs to be lowered. Use the adjustment screw on the top of the ball cock to the rod to lower the ball. The ball height should be one-half to one inch lower than the top of the overflow tube or at the water line marked in the tank. If you feel pressure and the water doesn't shut off when you pull up on the float ball rod, the ballcock is the problem. 
  3. If the ballcock looks like it is in good condition, try changing the washers in the top of the valve.
  4. If the valve is corroded or appears broken, replace it.
  5. To repair/adjust a ballcock with a float cup: Shut off the water supply to the toilet. Remove upper cap assembly of the ball cock by rotating 1/8 turn counterclockwise and lifting it off. Hold a container over the top of the uncapped valve to prevent splashing when the water supply is turned on. Turn the water supply valve on and off a few times to clear out debris. Replace the upper cap assembly.

Last Updated: Jul 23, 2014