Why Your Toilet is Leaking (and What You Can Do About It)

A leaking toilet might seem like a small problem at first — just a few drops of water around the base or an occasional sound of running water. But don’t be fooled — even a slow leak can waste hundreds of litres of water every day, increase your utility bill, and potentially cause serious water damage to your floors and walls. Understanding why your toilet is leaking is the first step to getting it fixed properly and preventing bigger issues down the line.

Common Causes of a Toilet Leak

1. Faulty Wax Seal
If you notice water pooling around the base of your toilet, the most common culprit is a worn or broken wax ring seal. This seal connects the toilet to the drain and prevents water from escaping. When it deteriorates, every flush can cause water to leak out, creating a musty smell or soft spots on your bathroom floor.

2. Cracked Toilet Tank or Bowl
Over time, hairline cracks can form in your toilet’s porcelain tank or bowl. Even small cracks can cause slow leaks that worsen under pressure. If you suspect a crack, it’s best to have it inspected and replaced immediately — patching usually only offers a temporary fix.

3. Faulty Flapper or Fill Valve
If your toilet seems to run continuously or you hear a constant trickle of water, the issue could be inside the tank. A worn flapper or a malfunctioning fill valve can prevent your toilet from sealing properly, allowing water to flow nonstop into the bowl. This type of leak might not be visible but will definitely show up on your water bill.

4. Loose Connections
Sometimes the cause is as simple as a loose bolt or a corroded supply line. Over time, connections can loosen or wear out, leading to small leaks around fittings and valves. Tightening or replacing these parts can often solve the problem — if you know what you’re doing.

Why You Shouldn’t Ignore a Leaking Toilet

Ignoring a toilet leak doesn’t just waste water — it can lead to serious damage in your bathroom. Water seeping into floors or walls can cause rot, mould growth, and structural issues. Plus, a running toilet can waste thousands of litres of water a year, driving up your bills. Getting professional help from a licensed Sydney plumber ensures the problem is identified and repaired correctly before it escalates.

Trust The Patient Plumber

When it comes to reliable and respectful plumbing service, The Patient Plumber is the name Sydney homeowners trust. We take pride in delivering flawless plumbing, zero rush, and total respect for your time, home, and peace of mind.

Whether you’re dealing with a leaking toilet, blocked drain, or burst pipe, our experienced plumbers in Moorebank and across Sydney are ready to help. With expert care and patient attention to detail, we’ll make sure your plumbing is fixed right the first time.

The Patient Plumber — the one plumber you need for honest, professional, and stress-free plumbing services in Sydney and Moorebank.