Wednesday, 23 January 2019 13:56

How to test for toilet leaks

Written by Danny Lipford
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Toilets can develop undetected leaks between the tank and bowl that can waste thousands of gallons of water if not repaired. If you notice your toilet refilling periodically when it hasn’t been flushed, it’s a sure sign your toilet has a leak.

There are two ways to test your toilet for leaks:

Toilet Leak Test #1: Remove the tank lid, and pour a small amount of food coloring in the tank to color the water in the tank. If colored water appears in the bowl without flushing the toilet, it indicates water leaking between the tank and bowl.

Toilet Leak Test #2: Another way to test your toilet for leaks is by turning the water to the toilet off at the shutoff valve. Remove the lid to the tank and note or mark the water level in the tank. Wait several hours to overnight without flushing the toilet, then check the water level in the tank. If the water level is lower, there’s a leak between the tank and bowl.


To repair a leaky toilet:

Turn the water off to the toilet.

Flush the toilet to empty the water in the tank.

Replace the rubber flapper valve in the bottom of the tank.

Turn the water back on and refill the tank, checking to make sure the tank stops filling before it reaches the top of the overflow tube.

Test the toilet again, using one of the two methods above, to see if the leak has stopped.

 Watch the video for details.

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