Q&A: My toilet keeps running, what should I do?

Well have you tried to catch it? … We joke, we joke.


In all honesty, there’s a lot of parts and seals in a toilet cistern. If you’re not confident with DIY, it will be easier (and cheaper) to call a plumber from the start to diagnose and fix your running toilet.

How to fix a leaking toilet

One of our favourite diagnostic DIY hacks:

To see if the flapper is leaking, here's a simple test:

1. Put a few drops of food colouring in the tank.

2. Wait for 25 minutes.

3. If the colour spreads into the toilet bowl, there's a leak.


While waiting for your plumber to arrive, turn the water off to the toilet at the inlet tap. This will save water until your plumber gets there.


Have questions about your leaking toilet? Give us a call on 0418 800 018 to talk to a Gympie plumber.