What Causes Toilet Flange Leaks & Can They Be Avoided?

September 20, 2023

The toilet flange, often overlooked, plays a critical role in ensuring a secure and watertight connection between the toilet and the sewer pipe. A leaky flange can cause various problems, from unpleasant odors to water damage. Our professionals at City Plumbing and Rooter have over 20 years of industry experience and understand the common causes of toilet flange leaks and how they can be prevented.

Causes of Toilet Flange Leaks

There are several potential causes for a leaking toilet flange, so it's important to properly investigate the reason for the issue. Common culprits include: 

  • Cracked or Broken Flange: Years of wear and tear or excessive pressure can lead to cracks or breaks in the flange, causing leaks.
  • Improper Installation: If the flange isn't set correctly on the floor or isn't aligned with the toilet base, it can lead to gaps and subsequent leaks.
  • Wax Ring Failure: The wax ring beneath the toilet, ensuring a watertight seal, can degrade over time or might not seat correctly from the start, leading to water leakage.
  • Corrosion: In some older homes, metal flanges can corrode due to prolonged exposure to water and waste, creating weak points where leaks can occur.
  • Bolts and Screws: Loose or rusted closet bolts holding the toilet in place can compromise the seal, allowing water to seep out.
  • Uneven Flooring: An uneven floor can prevent the toilet from sitting flush, leading to gaps between the flange, wax ring, and the toilet.

New Title

Although leaks can happen to even the most contentious property owners, there are steps you can take to safeguard your toilet against flange leaks. First and foremost, regular inspections are key. Like all plumbing fixtures, periodic checks can help detect early signs of wear, corrosion, or damage, allowing timely repairs. Always ensure that the flange is installed by a professional plumber who can ensure correct alignment and seating. Opt for high-quality, durable flanges and wax rings. Some homeowners are now choosing wax-free seals which have a longer lifespan and can create a tighter seal. Before installing a toilet, make sure the floor is even. If there are any irregularities, address them first to ensure a proper fit and seal. Note that while you want a secure fit, overtightening can crack the toilet or the flange. Tighten just enough to secure the toilet in place without causing strain. Finally, if you're renovating or notice that parts of your toilet fixture are aging, consider replacing components like the wax ring or the flange to preemptively avoid leaks.

City Plumbing and Rooter Can Fix Your Flange

While toilet flange leaks can be troublesome, understanding their causes and taking preventive measures can go a long way in maintaining a dry, hygienic bathroom. If you suspect a leak or need expert advice, contact City Plumbing and Rooter. Our transparent and trained team is committed to providing top-notch solutions for all your plumbing concerns.

Share by: