Fix Your Cast Iron Toilet Flange When It’s Too High

Getting cast iron toilet flange placement right is vital as it connects the toilet to the sewer pipe and ensures everything goes where it should. But sometimes, it can end up being a bit too high, causing issues like:

  • Water leaks
  • Leakage of sewage gas resulting in bad odour
  • Wobbling
  • Unsafe for users

So, learning how to fix your cast iron toilet flange when it’s too high is crucial for you. And my years of expertise in this field will help you learn how to go about the process like a pro.

What Happens If Toilet Flange Is Too High?

A flange that sticks out of your bathroom floor can cause more problems than you might be aware of. It can cause leaks that end up flooding your floor, which can lead to several other safety hazards. Apart from that, the toilet seat might also be too wobbly for your comfort. It’s time to get rid of this instability.

How to Fix a Cast Iron Flange That’s Too High?

It’s usually recommended to rely on a professional for a task like this. But if you are a skilled DIY enthusiast, then you should keep these detailed instructions in mind.

  1. You need a hammer for this first step. Start by hammering the flange down until it reaches ground level. Pick a block that is 2×4 in size and place it against the wall of the pipe. Gently tap using the hammer around the pipe. Apply a significant amount of force when the block reaches the flange.
  2. Only tap on the inside part of the flange without touching the rest of it. Make sure you don’t tap the outside part.
  3. Cast iron is too brittle and can break under force, so try not to tap too hard around the outside slots.
  4. Keep on tapping gradually and make your way towards the flange with the hammer. Make sure to do so until the flange is even with the floor.
  5. You might notice the lead seal on the flange loosening once you are done hammering. Recaulk the joints from both inside and out with the help of caulking irons. This will create a secure seal.
  6. Nibble down the exposed iron pipe with the help of a crescent wrench
  7. In case the lead joint turns out to be too tight, you might need to take down the pipe one piece at a time
  8. If none of these steps work, then your only option is to cut the flange with an angle grinder.

We also recommend to read our article on: How to Fix Uneven Toilet Flange?

Final Words

When the cast iron toilet flange is too high, it can create a world of trouble for you, from the wobbly toilet to water leakage. So, make use of my expert guide and fix your high cast iron toilet flange in no time.

If you’re not confident in your DIY skills, then you might call in a professional for help.

Hello, I'm Jon C. Brown, an expert in the field of toilets. With over 15 years of experience in this industry, a significant portion of my life has been devoted to crafting high-quality toilets and bathrooms. Consequently, I've received countless inquiries about the toilet and bathroom industries. That's why, I've launched this website to provide top-notch solutions for all your toilet and bathroom related needs.

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