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Clean Old Flange and Pipe Area — Prepare and Clean the Existing Flange

Beginner3 hours

Part of project

How to Install a Toilet Flange Extender After Tiling · Step 1 of 6

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In this video

Thoroughly clean the area by removing the old, broken-down wax ring, any existing repair clips or hardware, and all other debris from the old flange and surrounding floor. A putty knife is effective for scraping away the stubborn wax. The goal is to have a clean, clear opening into the cast iron pipe and a clean floor surface to work on.

Goal: Plumbing System Maintenance

Used in this video

  • Putty knife (Tool Type: Hand Tools, Power Source: Manual, Putty Knife: Metal) — Scraping away the old wax ring and other debris from the flange and floor.
  • Trash bag (Material: Plastic) — Disposing of the old wax ring and other waste.
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FAQs

Why do I need a toilet flange extender after tiling, and how do I know if I need one?

Tiling often raises the floor level, causing the existing toilet flange to sit too low. This prevents the wax ring from creating a proper, watertight seal, leading to potential leaks. You know you need an extender if the top of your existing flange is below the new finished floor level.

Is installing a toilet flange extender a difficult DIY project for a beginner, and how long does it typically take?

This project is rated as 'beginner' difficulty because it primarily involves careful measurement, cleaning, and sealing, not complex plumbing pipework. Most DIYers can complete it in approximately 3 hours, assuming all necessary tools and materials are readily available.

What are the most crucial tools and materials I'll need to ensure a successful, leak-free installation?

Beyond basic tools like a tape measure and caulk gun, a quality toilet flange extender kit and a reliable silicone sealant are critical. Don't skip on robust #10 3” wood screws for securely fastening the extender to the subfloor, as any movement can compromise the seal. Thorough cleaning materials are also essential.

What are the common mistakes to avoid when installing a toilet flange extender to prevent future leaks?

The most common mistakes include not thoroughly cleaning the old flange, failing to apply sufficient silicone sealant for a waterproof bond, and not securing the extender firmly to the subfloor. Always dry-fit the extender to ensure the correct height (flush or slightly above the finished floor) before applying sealant.

Transcript
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This means that I will be removing all of this and then I will be putting in this part here. This part of course goes well down past the crack and not only that, it has this rubber which when I put it in the hole, I will turn this and it will create a seal between the old system and the new flange. After I secure this to the floor, which I will make one cave here, one of the toilets nowadays, they are kind of stupid. The thickness here is barely enough to accommodate an actual floor flange. As you find the basement toilets that are set on a thin flooring, the toilet doesn't actually fully sit on the floor and that's because of this stupidity that they don't make the extra space. Like all they need to do is add a little half inch so that you would fit this and a little bit of wax and everything would be good. But hey, I'm not American standard crane or western pottery or any of these other professionals. So anyways, this flange, once I remove all of this, this flange will go down in the hole. I will twist the rubber so that it fits fairly snugly to start with and then I will turn the flange until I get a nice tight seal. And then I will, with some number 12 bolts or screws, stainless steel ones, I will screw this back down to the floor in a solid place sort of thing.

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