Leaking toilet: stop hidden leaks and save money now

A leaking toilet wastes water and pushes up bills. Some leaks are silent, so you may not notice them for weeks. Use the simple checks below to confirm a leak early, then book a repair for a lasting fix.

Where a toilet commonly leak

Image of a happy face on a toilet roll, representing a happy toilet. Under heading "Where a toilet commonly leak"

Inside the cistern

Typical culprits are the inlet valve, flapper or outlet washer, float height and seals. Worn parts let water seep into the bowl. If you need a toilet cistern replacement, we will fit quality components matched to your brand.

At the base

Leaks at the pan to waste seal cause dampness around the toilet. Loose pan bolts or movement can break the ring seal so water escapes with each flush. A toilet leaking at the base should be repaired quickly to protect floors.

External leaks

Cracked tanks, perished hoses or loose connections can drip outside the pan. You might notice puddles, staining or musty smells. These also point to a leaking toilet that needs attention.

Simple checks you can try

  • Add a few drops of food colouring to the cistern. Wait 10 minutes. If colour appears in the bowl, you have a silent leaking toilet.
  • Check for wobble at the base. If the pan moves, the seal may be failing.
  • Feel around the inlet hose and shut-off valve. Look for dampness.
  • Listen after a flush. Refill hissing that continues may signal a faulty inlet valve or a cistern that needs repair.

Our repair process for a leaking toilet

One of our plumber seating a replacement toilet pan to fix a leaking toilet in Bunbury.

Leaking Toilet Diagnose

We inspect internals and check water levels. We assess the pan fixing and ring seal so your leaking toilet is repaired at the source.

Toilet cistern replacement and seal upgrades

We replace worn inlet valves, flappers or outlet washers to suit your cistern. Where parts are obsolete or damaged, we complete a toilet cistern replacement with compatible, water-efficient components. We also renew perished seals and set the float to the correct level.

Re-seat the pan if needed

If the base leaks, we lift the pan, renew the ring seal and refit with stainless fixings. We shim and secure to stop movement and prevent the leaking toilet from returning.

Test, clean and confirm

We flush several times, recheck for dye transfer and wipe all joins dry. You get clear confirmation that the seal is tight and the leaking toilet is fixed.

Efficiency upgrades while we are there

  • Dual-flush conversions where compatible.
  • Advice on water-saving settings and modern, efficient fixtures.
  • Fine-tuning the fill level to balance performance and savings.

If you suspect your toilet is leaking

Our team can come and assess the issues and recommend repairs or replacement across Bunbury, Busselton and the South West WA. For all emergancies, get in touch with out team asap. Phone 08 9725 9618 we are on call 24/7.

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FAQ’s about Leaking Toilets

How urgent is a leaking toilet?

Urgent. A leaking toilet can waste hundreds of litres a day and a base leak can damage floors. Turn off the isolation tap and book a repair.

Why is my toilet leaking after a flush?

If water appears only after flushing, the pan to waste seal or tank to bowl bolts may be failing. If water trickles constantly into the bowl, the inlet valve, flapper or outlet washer in the cistern is the likely cause.

How do I stop water trickling into the toilet bowl?

Do a dye test. If colour enters the bowl, the outlet washer or flapper is passing. Replacement and a correct water level setting will stop the trickle. A full toilet cistern replacement may be needed if parts are obsolete.

Should I call a plumber for a toilet leak?

Yes, especially for base leaks or persistent trickles. DIY attempts can mask the problem and increase water damage or water use.

Do I need a plumber to replace a toilet fill valve?

It is best. Fill valves must be matched, set to the right height and adjusted to prevent hammer and overfill. A licensed plumber will test pressures and backflow compliance.

How often should a pan seal or “wax ring” be replaced?

There is no fixed schedule. It should be replaced whenever the pan has been moved or if there is movement, odour or dampness at the base.

How do plumbers detect hidden leaks?

We use dye tests, visual inspection, moisture checks and level settings. We also isolate the cistern to confirm if the inlet valve is passing.

Can I fix a toilet flush without calling a plumber?

You can try checking the isolation tap is fully open and ensure the float is not stuck. If that does not resolve it, book a professional repair.

Is it hard to fix a leaking toilet?

Some fixes are straightforward, but matching parts, re-seating pans and sealing bases require experience. Errors can lead to repeat leaks.

How do I figure out where a toilet leak is coming from?

Use the dye test for internal leaks. For external leaks, dry all joints, then flush and observe the tank to bowl bolts, the inlet hose and the base.

How long should a toilet last?

Pans last for decades. Cistern internals wear sooner. Regular maintenance or a toilet cistern replacement restores performance and water efficiency.

What is the most common cause of a toilet leak?

For trickles into the bowl it is usually the outlet washer or a mis-set water level. For floor leaks it is movement at the base or a failed pan collar.

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