Toilet Leaks: How to Detect and Fix Them

A toilet leak can be a real pain. Not only is it annoying, but it can also lead to some serious damage if left unaddressed. If you’re dealing with a toilet leak, don’t worry—we’re here to help. In this blog post, we’ll go over some of the most common causes of toilet leaks and how to fix them. Keep reading to learn more!

Loose or Faulty Connections

One of the most common causes of toilet leaks is a loose or worn out wax ring. The wax ring is a ring of wax that forms a seal between the bottom of the toilet and the top of the drainpipe. Over time, this wax can break down, leading to leaks. If you think your wax ring may be the problem, you can try replacing it yourself or calling a plumber for assistance.

Worn-Out or Stuck Flapper

Another common cause of toilet leaks is a broken or damaged flapper valve. The flapper valve is located at the bottom of the tank and is responsible for keeping water in the tank until you flush the toilet. If this valve is damaged or not closing properly, it can lead to water leaking from the tank into the bowl—and that’s not something you want!    Fortunately, this is an easy fix; simply replacing the flapper valve should do the trick.

Faulty Fill Valve Float

Your fill valve is a hollow ball that tells the toilet tank when it needs to be refilled. If cracked or not aligned, your fixture will run continuously and short-circuit these processes!  You can rule out the flapper by putting dye in the toilet tank and waiting for several hours to see if it changes the color of the bowl water.

Condensation on the Outside of Bowl or Tank

Bathrooms are humid, wet spaces, especially during and after a shower. The water inside your toilet will make the outside of your tank or bowl cool, the warm, damp air reacts causing condensation. If you spot water on the outside of your toilet tank or bowl it could just be condensation although, it’s a smart idea to check whether your condensation is from a leak. If you suspect your toilet may be leaking check the tank for any cracks or damage. Hairline cracks often can be patched with a porcelain epoxy. Larger cracks usually cannot be repaired, and requires that the toilet be replaced.


If your toilet is leaking, there’s no need to panic—in most cases, it’s a relatively easy fix. In this blog post, we walked through some of the most common causes of toilet leaks and how to fix them yourself. Of course, if you’re not comfortable attempting these repairs on your own, please give us a call and we’ll be happy to help!

JIG Sewer and Drain Cleaning

If you do end up with a clog, give JIG Plumbing a call. We’re here to help! Learn more about our sewer and drain cleaning by clicking here.

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