Why is my toilet constantly running?

25/02/19

Why is my toilet constantly running

An overfilled tank due to a crooked float arm - The float arm in a toilet set up is a device that keeps the water in the tank at a certain level. If this level is set too high the inlet valve that the arm is attached to will remain open allowing water to continuously flow into the bowl. This is an easy fix for both modern and older style float arms. Old style metal float arms can be bent back into place relatively easily while modern plastic float arms need to be adjusted with a screw positioned at the top of the arm. 


A broken flushpipe seal – If after the simple fixes of replacing the washer and adjusting the float arm don’t stop the running water, the issue could be more serious and mean that the seal between the cistern and the bowl is loose and worn out. 


To fix it you need to remove the tank and replace the seal entirely which needs to be done by a qualified plumber to make sure the seal is correctly placed and will keep the water in.

Some other common issues that can cause cistern leakage are:

Toiler Cistern being installed

How to tell where the pipe is leaking from.

Start by removing the lid from the cistern and putting a colouring into the water (e.g. food colouring). If after 10 minutes the water in the bowl has any colouring to it, the cistern is leaking. Once you have determined that there is a leak, turn off the water to the toilet by turning off the attached tap, and mark the water level on the tank using a pen or pencil. 


If after 10 minutes the water level has dropped the leak is coming from the inlet valve, and the washer needs to be replaced.

When a toilet is leaking, it may not be noticeable at first but over time it will start to become more obvious. Aside from the constant noise of running water, your water bills will start to rise as well.


Leaking toilet cisterns are a very common problem that most people will have to deal with at least once in their lifetime, and most of the time there is an easy fix to stop the leak. But before you start trying to repair your cistern you need to figure out where the leak is coming from.


The most common cause for a leaking cistern is a loose rubber washer on the inlet valve that stops water from flowing into the bowl. This is a very simple fix that can be performed yourself but before you start any repairs you need to make sure that it is the washer causing the problem.

If you have ever sat in your house and heard the continuous sound running water even though all your taps are firmly turned off, the source may be a place that you wouldn’t expect. Your toilet.

If you have any plumbing questions or doubt your DIY ability, always contact a licenced plumber. Here at WJS Plumbing, we are available anytime of the day or night for emergency plumbing repairs. So whether you suddenly find yourself standing in a puddle of water because a seal in your toilet has failed or even if the sound of a constantly flushing toilet is keeping you up at night contact the team. We are happy to help get your plumbing issues sorted 24/7.


WJS Plumbing, your 24/7 emergency plumbing specialists.

If you need a plumber, we’re the guys to call.  Alternatively, send us an enquiry here and we’ll get back to you.

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For a 24/7 emergency plumber in North Brisbane call WJS Plumbing Service on (07) 3555 7967 or send us an enquiry here and we’ll get back to you.

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