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An Easy, 8-Step DIY Guide On How To Replace A Toilet Cistern

by | Sep 29, 2021 | Plumbing

Apart from the bowl itself and the pipes and drains that deliver the water and take away the waste, your toilet is really all about the cistern. And while you’ll need a licensed plumber to do pretty much all the plumbing work around your place, replacing a toilet cistern is something you’re actually allowed to do yourself.

Before heading in to replace your toilet cistern, you should first diagnose the problem as sometimes there could be a totally different plumbing problem: It could be:

Of course, plumbing DIY is not for everyone: get it wrong, and the damage can be extensive, the repair bill significant, and the mess … rather messy indeed! But if you’re a bit of a whiz with a wrench and you know the difference between sticky tape and plumber’s tape, you might like to take a crack at replacing a toilet cistern with our step-by-step guide.

1. Are you confident?

Are you only finding out right now what the difference is between your toilet bowl and the part that you lean your back on when you’re on the throne (the cistern)? Remember, it’s an extremely simple and relatively inexpensive task for a great local Melbourne plumber to get done in a jiffy, so if you’re not sure … leave it alone.

2. Check your replacement cistern

Remember: not all cisterns are created equal. Before learning how to change cistern systems, you’ll need to make sure you’re replacing it with a compatible unit in terms of type and size. Once you’re sure, read any instructions that come with your new cistern thoroughly.

3. Flush

Actually, before you do anything, close the stop tap and turn off the mains – and then pull that chain or press that flush button. Before removing the old one and putting in a replacement toilet cistern, it will have to be empty – or it’s going to get rather messy.

4. Remove the old one

Take a look at the bottom of the unit and locate the inlet pipe. With a wrench, undo and then remove it, and then find the few nuts and bolts that are holding the cistern in place.

5. Replace toilet cistern

If you were able to remove the old cistern, you pretty much already know how to change toilet cistern units already … do it in reverse! If you’ve bought the right replacement unit, everything – especially the cone gasket and attachment hole – should line up perfectly.

6. Where’s your plumber’s tape?

Remember that plumber’s tape we mentioned earlier? Well, before re-attaching the hose to the new unit, use that tape like a boss! It will help to seal the thread and lubricate the connection – and if you need to replace toilet cistern again in the future, it will be easier to disassemble the next time.

7. Tighten it all up

Now, grab that wrench again and make sure everything flush and nice and tight.

8. Test your replacement toilet cistern

Turn on the mains, turn the stop tap back on – and listen to the glorious sound of your new toilet cistern filling up, ready for its first flush. With a bit of luck and skill, nothing will be leaking and you’ll soon be ready for a test-drive.

But if you’ve got to Step 8 and you’re almost ankle-deep in water and in need of a Panadol, you could always call for toilet repair and installation services… immediately! With no call-out fee, fixed and upfront pricing and a lifetime labour guarantee, you can trust Ezy-Plumb to fix anything and everything to do with your home’s hardest-working seat. And if replacing a toilet cistern the DIY-way went horribly wrong, we’re always on call for a messy plumbing emergency, too! Call today.

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For up front pricing and a lifetime labour guarantee, call the plumbers Melbourne locals can rely on for fast and friendly service.