Learn How to Fix a Leaking Toilet from the Base

Let’s face it - nobody wants to deal with any leak in their living space, and more so if it’s the infamous toilet leak. So, what causes a toilet leak, how can you fix it, and how can you prevent such leaks in the future? Newbury Park toilet repair specialists at Conejo Valley Home Services Plumbing & Rooter have made this guide that goes through the reasons behind your toilet leak, the tools you’ll need to DIY fix a leaking toilet, and how to prevent future leaks.

No matter the case, getting a professional to ensure the problem isn’t coming from somewhere else is always recommended. Call Conejo Valley Home Services Plumbing & Rooter at (805) 499-0448 to discuss your needs or request immediate service!

How to Fix a Leaking Toilet from the Base

Reason Why a Toilet Leaks at the Base

Here are the five main reasons why your toilet might be leaking from the base:

» The T-Bolts Need Retightening

If the bolts holding the base of your toilet to the ground loosen, the toilet may rock, breaking the wax ring’s seal, which leads to leakages.

» The Wax Ring Needs Replacing

The wax ring may have been worn down over the years and no longer functioning as it should. If the seal is no longer intact, it may cause water to seep through the base.

» There’s a Loose Water Supply Line

If water leaks from the base of your toilet all of the time, the water supply line is likely to blame. The water supply tube that connects the tank and bowl could weaken over time, leading to leakages. To fix this, you must check the connection between the supply line and the tank to ensure the nut and rubber seal are tight.

» Water is Condensing on the Toilet

Just as with condensation on our windows, when warm air hits the cold toilet, moisture settles on the cold toilet surface as water droplets. You’ll then notice water pooling at the base of your toilet. While we can’t stop condensation, regularly running your air conditioner or dehumidifiers, especially on humid days, will help reduce it.

» Cracked Toilet Bowl

If water leaks every time you flush the toilet, your toilet bowl or tank may be cracked. Since some cracks may be hidden, you will need to thoroughly inspect the toilet to determine if there are indeed any cracks. If there is, you may need to replace the toilet.

Also Read: How To Fix A Leaking Bathroom Faucet

Tools You’ll Need to Fix Your Toilet from Leaking

Once you discover the source of the toilet leak, it’s time to gather the proper tools you need to fix it. The tools you’ll need to fix your leaking toilet include:

  • Gloves and protective gear
  • Wrench
  • Bathroom cleaner
  • Cleaning cloths
  • Screwdriver or a cordless drill if you have tight bolts
  • Replacement parts you may need, including gaskets, washers, a wax ring, and bolts
  • Putty knife
  • Caulk

If you have all these tools and materials, you’re ready to start the repair process to stop your toilet leak. If you don’t, contact Conejo Valley Home Services Plumbing & Rooter to hire a professional Newbury Park plumber who can handle all your plumbing problems, small and large.

How to Fix a Leaking Toilet Base

A toilet leaking from the base is usually an easy fix with proper DIY how-to steps. Here, we’ll provide step-by-step instructions to help you diagnose and fix a leaking toilet.

When repairing a leaking toilet, we recommend first checking for condensation build-up on your toilet bowl because the toilet may just be sweating, not leaking.

Sweating toilets are pretty common, especially during the summer. This can happen for several reasons, but some of the most common include:

  • The toilet is close to an exterior wall
  • The bathroom isn’t well ventilated
  • There is a leak somewhere in the bathroom


If your toilet is sweating but not leaking, here are a few things you can do to try and fix the problem:

  • Open windows during and after showers for ventilation
  • If your toilet is close to an exterior wall, insulate the pipes 
  • Place a dehumidifier in the bathroom

Unattached or loose t-bolts are another common culprit behind leaky toilets. T-bolts are the pieces of metal that attach the toilet to the floor and keep it secure. Should they become loose or dislodged, they can create gaps between the toilet and the wax seal, allowing water to seep through and leak onto the bathroom floor.

If the bolts are loose, carefully tighten them using a pair of pliers. Don’t over-tighten the bolts, as this can damage the toilet and possibly require complete replacement. If your toilet still feels loose after tightening the bolts, you may need to install plastic shims between the flange and the floor.

If the bolts are already tight, but your toilet is still leaking at the base, you may need to remove the toilet to install a new wax ring.

Remove your toilet using the following steps:

  • Flush your toilet and tank
  • Use a screwdriver to unscrew the supply tube 
  • Use a wrench to undo the nuts from the bolts at the toilet’s base
  • Remove the toilet and set it on its side to prevent damage

Once you’ve removed the toilet, use a putty knife to scrape off all the old wax around the drain opening. Install a new wax ring with the plastic cone facing down toward the drain. Ensure the bolts are positioned correctly on each side of the flange.

Next, lift the toilet and press it down onto the wax ring, rocking it gently to create a tight seal. Use a wrench to tighten the bolts and nuts, ensuring you don’t over-tighten them. Reconnect the water supply tube and flush the toilet before inspecting for leaks. If there are no leaks, seal the base of your toilet with caulk.

Preventing Future Toilet Leaks

Here are five ways to prevent toilet leaks in the future:

  • Fix leaking toilets as soon as possible
  • Flush only human waste and toilet paper down your toilet
  • Don’t unclog your toilet with chemical drain cleaners
  • Inspect your toilet’s components every six months
  • Hire a plumber if you aren’t comfortable handling DIY toilet repairs

How Much Does a Toilet Repair Cost?

Most remedies for toilet leaks are pretty straightforward, but you may prefer a professional to handle the matter. If you are thinking about how much using a professional may cost, call us today at (805) 499-0448 for a free estimate!

Still Got a Leaky Toilet? Call the Experts at Conejo Valley Home Services Plumbing & Rooter!

A leaking toilet is a problem you surely never want to face. But with the repair tips provided by Conejo Valley Home Services Plumbing & Rooter, you are in a better position to handle this situation should it arise. That said, some toilet plumbing problems are beyond your control, and sometimes, you need to hire a professional plumber to alleviate your worries and stress regarding plumbing repairs.

Count on Conejo Valley Home Services Plumbing & Rooter to be here for you 24/7 to handle any plumbing emergency you might be experiencing. Call us today at (805) 499-0448, and we’ll address all your Newbury Park plumbing needs!

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03:16 07 Feb 23
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