Close-up of a white ceramic toilet leaking water at the base onto a tiled bathroom floor.

What’s the Usual Process for Repairing a Leaking Toilet?

April 20, 20250

A leaking toilet might seem like a small nuisance, but if left unattended, it can lead to higher water bills, water damage, and even mould growth. Whether you’re hearing a constant trickle or noticing water pooling around the base, it’s important to address the issue quickly. In this guide, we’ll walk you through the usual process for fixing a leaking toilet, when to call in a professional, and how South East Plumbing Engadine can help with reliable, efficient plumbing solutions.

Common Causes of a Leaking Toilet

Before jumping into repairs, it’s helpful to know what might be causing the leak. Some of the most common reasons include:

  • Worn-out flapper valve – A faulty rubber flapper is the most common culprit for toilets that run constantly
  • Loose or broken seals – Water leaking at the base may be caused by a broken seal or wax ring
  • Cracked toilet tank or bowl – Hairline cracks can lead to slow leaks that worsen over time
  • Corroded or damaged inlet valve – This affects how water flows into the tank

The Process of Fixing a Leaking Toilet

Here’s the usual step-by-step process a licensed plumber follows to fix a leaking toilet:

1. Inspection and Diagnosis

The plumber will first inspect the toilet thoroughly—checking around the base, behind the tank, and inside the cistern. They’ll identify whether the issue lies with internal parts (like the flapper or valve) or external seals and connections.

2. Isolating the Water Supply

Before any repair work begins, the water supply to the toilet is shut off. This prevents further leakage and allows safe dismantling of parts.

3. Replacing Faulty Components

Depending on the issue, the plumber may:

  • Replace the flapper valve if it’s worn or warped
  • Repair or swap out the inlet valve or flush valve
  • Tighten or replace tank bolts and rubber gaskets
  • Install a new wax ring if water is leaking at the base

4. Resealing and Reassembling

After new parts are installed, the plumber will reseal the connections and reassemble the toilet components. They’ll ensure everything is watertight and aligned properly.

5. Testing for Leaks

Finally, the water supply is turned back on, and the toilet is flushed several times to check for ongoing leaks. A good plumber will also double-check for slow leaks that may not be immediately visible.

When to Call a Professional for Leaking Toilets or Taps

While some minor toilet issues may be DIY-friendly, it’s best to contact a professional if:

  • You can’t identify the source of the leak
  • Water is pooling around the base or leaking from underneath
  • There are signs of mould, odour or water damage
  • You’re unsure how to safely shut off or reconnect plumbing

At South East Plumbing Engadine, we don’t just stop at leaking toilets, we also specialise in fixing leaking taps, blocked drains, burst pipes, and more.

Why Choose South East Plumbing Engadine?

When it comes to fast, affordable, and professional plumbing in Sydney, here’s why locals trust South East Plumbing Engadine:

Licensed and Experienced Plumbers

Our fully licensed team has decades of combined experience fixing everything from leaking toilets to complete bathroom plumbing systems.

Same-Day Service Available

Need help urgently? We offer same-day repairs for leaking taps and toilets across the Sydney metro area.

Transparent Pricing – No Hidden Surprises

We provide upfront quotes with no hidden fees, so you always know what to expect.

We Respect Your Home

Our plumbers arrive on time, clean up after the job, and treat your property with care and respect.

Trusted by Sydney Locals

We’re proud to be the go-to plumbers for thousands of Sydney homeowners, landlords, and businesses.

Fixing Leaking Taps and Toilets – Book with Confidence

If your toilet or taps are leaking, don’t put off repairs—what starts as a slow drip can turn into a major problem. Whether it’s fixing leaking toilets, repairing leaking taps, or a full bathroom inspection, South East Plumbing Engadine is here to help.

Contact South East Plumbing Engadine today for fast, friendly, and expert service.

Need help now? Call us & we’ll get it sorted quickly.