Help! Why is My Toilet Leaking?

Written on the 18 June 2024

A leaking toilet can be a homeowner's nightmare, but understanding the root causes makes it easier to tackle the problem head-on. Whether you're a homeowner or a property manager, knowing what to look for can save you time, money, and a lot of stress. Let's break down the most common causes of a leaking toilet and how you can address them.

Common Causes of a Leaking Toilet

1. Broken Seals

One of the most frequent culprits behind a leaking toilet is a broken seal. The seals around your toilet are designed to keep water where it should be, but over time, they can wear out or become damaged. If you notice water pooling around the base of your toilet, a broken seal might be to blame.

Solution:

• Turn off the water supply to your toilet.
• Remove the toilet to access the broken seal.
• Replace the seal with a new one, ensuring it fits securely.
• Reinstall the toilet and reconnect the water supply.

2. Leaky Flush Valve

A leaky flush valve can cause water to seep from the tank into the bowl, leading to a constantly running toilet. This not only wastes water but can also increase your utility bills.

Solution:

• Turn off the water supply.
• Drain the tank by flushing the toilet.
• Inspect the flush valve for cracks or damage.
• Replace the flush valve if necessary.
• Turn the water supply back on and check for leaks.

3. Faulty Fill Valve or Float

The fill valve controls the water entering the tank after a flush, and the float regulates the water level. If either component is faulty, it can cause water to overflow into the tank and leak out.

Solution:

• Check the fill valve and float for any signs of wear or damage.
• Adjust the float to maintain the correct water level or replace the faulty parts if necessary.

4. Cracked Toilet

Cracks in the toilet bowl or tank can lead to leaks. While hairline cracks might not be immediately noticeable, they can worsen over time and cause significant water damage.

Solution:

• Inspect the toilet tank and bowl for visible cracks.
• If you find any cracks, it's often best to replace the entire toilet to prevent future leaks.
• Consider hiring a professional plumber to ensure the installation is done correctly.

5. Loose Tank Bolts

The bolts that secure the tank to the bowl can loosen over time, causing leaks around the base of the tank. This issue is relatively easy to fix but can cause significant water damage if left unaddressed.

Solution:

• Turn off the water supply to the toilet.
• Use a wrench to tighten the bolts securely.
• Be careful not to overtighten, as this can crack the porcelain.
• Turn the water supply back on and check for leaks.

6. Blocked Drains

A blocked drain can cause water to back up and leak from the base of the toilet. This is often accompanied by slow draining and unpleasant odours.

Solution:

• Use a plunger to try and clear the blockage.
• For more stubborn clogs, consider using a toilet auger.
• If the blockage persists, it may be best to call a professional plumber to avoid damaging your plumbing system.

A leaking toilet is more than just an inconvenience—it can lead to water damage, increased utility bills, and potential health hazards. By understanding the common causes and taking proactive steps to address them, you can maintain a functional and efficient bathroom.

If you're unsure about tackling these issues on your own, don't hesitate to reach out to Dr. Plumbing & Gas. Our experienced team is here to help you diagnose and fix any plumbing problems you may encounter. Give us a call today and ensure your home stays leak-free!