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How to Fix a Leaking Caroma Slimline Cistern

Brandy Alexander

Over time, water in the cistern of your Caroma toilet cistern may begin to leak. This is almost always due to the degradation of rubber seals. Replacing damaged seals is relatively easy as long as you follow the right steps in the right order. There is no need to call a plumber for an expensive visit. Instead, find the leak yourself, get the appropriate seal, and install it to save yourself a huge bill.

Now you can fix a leaking toilet cistern yourself.
  1. Remove the lid to the toilet cistern. Lift it off vertically and set it aside. Look and listen for the leak. As there are many washers, inlet and outlet pipes, there could be a number of locations for leaks to occur.

  2. Turn off the water inlet valve. This will be a knob located behind the toilet, coming from the wall or floor, leading to the cistern. Turn it clockwise until closed.

  3. Flush the toilet by pressing the flush button. This will drain the water from the toilet making access to the washers easier, but the cistern will not refill as the water has been turned off.

  4. Remove the float ball. To do this, push out the plastic pin that holds the float arm to the water control assembly then lift out and set it aside.

  5. Unscrew the exposed cap under the float arm and lift the exposed water control assembly up and out. Turn it over to find the rubber seal. If damaged replace with a similar type commonly found at home building stores.