Is Your Toilet Cistern leaking? Don’t Waste Water

A dripping toilet tank or toilet can squander as much as an amazing 400 -600 litres of water a day. You could be squandering valuable water, causing damage to your house, costing yourself cash, wasting important eco resources and all without even observing!


It is most likely that if your toilet cistern is dripping onto the floor you will discover it extremely rapidly and deal with it instantly.

If the outdoor overflow is running you will likely see it within a day or more and fix it rather rapidly, nevertheless most modern-day cisterns are designed to overflow into the pan and a slow but stable flow of this type is the kind of leakage that can trigger a waste of water of the type mentioned above.

To assist you imagine that, that is equivalent of 5 bath fulls of water, every day!

Separating the water is simplified if you have actually formerly fitted seclusion valves– this indicates you can turn off the isolating valves instead of the main stop dick, so that the water is on all over your home other than to the cistern that you want to work on.

Learn more about isolation valves and how to fit them in our job here– if you are going to be working on your dripping bathroom and you have not yet fitted service valves, you may also do it now.

Toilet Cistern Leaking into the pan
If you have a contemporary push button toilet mechanism where the overflow encounters the pan then the leak is hard to spot, but you may see your water costs are getting greater. On closer evaluation you may see that you can hear water running when the toilet hasn’t been flushed or can see a small but constant trickle at the back of the toilet pan.

Here is some recommendations on spotting a leak offered by Thames Water:

  • Wait until thirty minutes after the last flush then clean the back of the pan dry with bathroom tissue.
  • Place a new, dry sheet of toilet tissue across the back of the pan. Leave it in place for approximately 3 hours without using the toilet (it might be best to do this over night).
  • If the paper is wet or torn in the early morning, you know you have a dripping bathroom
  • If you have actually found a leak the next section informs you how to handle a cistern that keeps dripping.

Push Button Toilet Tank Keeps Running
If your push button toilet cistern keeps running it can be triggered by a little bit of grit or limescale entering into the mechanism. In some cases this can be removed by giving the button a few short sharp taps, or by flushing both buttons and holding them down to guarantee the tank drains pipes fully.

If these approaches do not work it is cheaper and much easier to replace the complete defective flush system– see more about fixing and changing push button toilet cistern fittings here.

Toilet Cistern Leaking onto the Floor
If you have a leak onto the flooring and you have a close-coupled toilet the most likely cause is that the cistern and the toilet requirement to be fitted a precisely 90 degrees– see our task on Close Coupled Toilet leaks here.

If you have water leaking from the cistern and you have a low level toilet then it is likely to be the seal around the pipe where the water enters the cistern or where it leaves the cistern to stream into the pan. You will be able to tell where the water is coming from by wiping the entire location dry and then using a paper towel to wipe around the joints to see where the water is getting out.

If your toilet just leaks when the toilet is flushed then it is more likely that the leakage is coming from the coupling to the waste pipe for the toilet.

Toilet Cistern Leaking From the Bottom
Simply inspect that it is in fact a leakage and not condensation. You will marvel just how much water can condense on a cold tank if the air around it is warm and humid– see more about how to resolve this problem in our task about condensation on toilet cisterns.

If it is not condensation and not originating from any of the plumping joints then it could be that you cistern, in which case it is much better to change the tank.

Dripping Toilet Cistern Overflow
The water level in the tank is controlled by an adjustable float or ballcock. If the float is set too expensive then the water level also gets too high, so water faces the overflow This can be a pipe that leads outdoors or, in more modern-day systems, down into the toilet pan.

There can be a number of causes of a dripping toilet cistern and if your’s does leakage, get it fixed as quickly as you can to conserve yourself cash and likewise reduce any ecological effect.

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