Repairing Guides

how to repair a cast iron toilet flange

by Ms. Marisol Halvorson DDS Published 3 years ago Updated 2 years ago
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How to Repair a Cast-Iron Toilet Flange

  1. Close the shut-off valve behind the toilet to stop the flow of water.
  2. Remove the lid from the toilet tank. Flush the toilet and hold down the flush lever to drain as much water from the...
  3. Reach inside the tank and unscrew the ball float.
  4. Use a large sponge to sop up the remaining water from inside the tank and from the...

Full Answer

How to repair a loose flange on a toilet?

Materials

  • Plastic shims
  • Tub and tile caulk (color-matched to your toilet and flooring)
  • Paper towels or rag

How do you replace cast iron flange?

How to Replace a Cast Iron Toilet Flange

  1. Seal the open to the sewer line with an expansion plug or large towel to prevent debris from entering the drain system.
  2. Drill out the old lead seal that is holding the cast iron toilet flange in place. ...
  3. Remove the Oakum packing material that is located under the lead seal with a heavy screw driver or chisel.

More items...

How do I remove the old toilet flange?

Removing an Old PVC Toilet Flange

  • Get your internal pipe cutter and insert the small circular saw into the drill chuck. ...
  • Use the internal pipe cutter to separate the flange from the waste line by cutting at the point where they meet, which are 3 to 4 inches from the flange’s ...
  • When you have cut through the whole flange, lift it straight off the subfloor.

How to repair a hole in cast iron pipe?

Cast iron pipes last for a long time, but this does not mean they cannot become damaged and start to leak. Leaks are usually caused by corroding sections, often around the leaded joints. A do-it-yourselfer can repair small leaks in joints and small holes, but a professional should handle large leaks.

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Can you repair a cast iron toilet flange?

6:0710:06How to Repair a Cast-Iron Toilet Flange | Ask This Old HouseYouTubeStart of suggested clipEnd of suggested clipAll right so we got it all cleaned up and you can see the old cast iron Bend right here.MoreAll right so we got it all cleaned up and you can see the old cast iron Bend right here.

How much does it cost to replace a cast iron toilet flange?

If you plan to replace your toilet flange and wax ring yourself, all of the supplies you need will usually cost under $40. If you're using a cast iron flange rather than a PVC flange, your total installation cost will be closer to $75. The national average cost to have a plumber replace your flange is around $175.

How do you remove an old cast iron toilet flange?

3:2321:54REMOVING & REPLACING a Cast Iron Toilet Flange - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo our first step is to drill out that lead all right i'm going to use my electric drill today aMoreSo our first step is to drill out that lead all right i'm going to use my electric drill today a cordless would work fine i'm going to start with a quarter inch drill bit.

Can a broken toilet flange be repaired?

If just the flange is broken, you can use a convenient flange repair ring, like Oatey's Fix-It Flange Repair Ring, to securely reinstall the toilet. A product like this makes repairs easy because it can be installed above the broken toilet flange with four screws and silicone sealant.

How do you fix a rusted toilet flange?

2:396:34Broken Rusted Closet Flange Replacement Kits | How To - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut the screw holes didn't quite line up and this job was done so poorly they only put two screws inMoreBut the screw holes didn't quite line up and this job was done so poorly they only put two screws in there. So I could actually you know put this in.

Can you put a new toilet flange over an old one?

Apply a generous bead of 100% silicone caulk on top of the old closet flange. And to the bottom of the new closet flange extender. Either slide the new closet flange bolts into the old flange before adding the extender or add them after you adhere the extender to the old flange.

Can you replace cast iron pipe with PVC?

Replacing cast iron pipe is expensive as they deteriorate from oxidization. Cleaner – Because PVC doesn't corrode or rust, you won't get any metal in your sewage or drinking pipes. It's a non-toxic material, safe to use for all kinds of plumbing purposes.

Are toilet flanges glued?

In addition to being glued to the waste pipe, toilet flanges are typically attached to the bathroom subfloor with screws. Often, there are four screws that attach the flange to the subfloor. All of these must be removed with an electric drill or screwdriver to allow for removal.

Can you connect cast iron to PVC?

0:031:32Tie In to Cast-Iron Pipe With PVC - YouTubeYouTubeStart of suggested clipEnd of suggested clipTying into cast iron with PVC is a great way to add new waste lines.MoreTying into cast iron with PVC is a great way to add new waste lines.

How do you use a flange repair kit?

1:1910:00How to Repair a Broken Toilet Flange on Cast Iron, PVC or ABS - YouTubeYouTubeStart of suggested clipEnd of suggested clipUp clean it up as much as it needs to be. So now we have our part which is this is 3d plumbingMoreUp clean it up as much as it needs to be. So now we have our part which is this is 3d plumbing products toilet flange repair kit it's a new product.How to Repair a Broken Toilet Flange on Cast Iron, PVC or ABS - YouTubehttps://www.youtube.com › watchhttps://www.youtube.com › watchSearch for: How do you use a flange repair kit?

What causes a toilet flange to break?

Old cast iron and all-plastic toilet flanges are the most likely to break. The problem is usually caused by rocking toilets or overtightened toilet flange nuts. Look for a cracked or broken rim on the outside of the slots that hold in the bolts (Photos 3 and 4).Feb 28, 2020How to Repair a Leaking Toilet - The Family Handymanhttps://www.familyhandyman.com › project › how-to-rep...https://www.familyhandyman.com › project › how-to-rep...Search for: What causes a toilet flange to break?

Should you caulk around toilet flange?

Caulk prevents a fouling area. If mop water, bathtub water, or a less pleasant “bathroom liquid” gets underneath the toilet, there is no way to clean it up. Caulking around the base of the toilet will prevent this from happening.Aug 1, 2017Caulk the toilet base? Yes. - Structure Tech Home Inspectionshttps://structuretech.com › caulk-toilet-base-yeshttps://structuretech.com › caulk-toilet-base-yesSearch for: Should you caulk around toilet flange?

How much should it cost to replace a toilet flange?

around $145 to $165If your toilet is creaking or wobbling, you may need to replace the flange. For a plumber, replacing a toilet flange is a quick and easy job. Assuming no other complications pop up, you can expect to pay around $145 to $165 for this simple repair.

How much would it cost to replace a toilet flange?

$145 to $165To put in a new flange, expect to pay $145 to $165, including labor. The flange part itself averages $7 to $20. Faulty flanges cause leaks. Total project price will depend on the severity and location of the leak.

How long does it take to replace a toilet flange?

A straight toilet retrofit takes approximately four to six hours. If you have to repair the flange, however, you could spend the entire day working on the toilet. The bathroom will probably be out of commission for several days if you need to do subfloor repair.

Will a broken toilet flange cause a leak?

Broken, loose, or improperly installed toilet flanges can cause a toilet to leak from the bottom, risking flooding, water damage, or even the release of unwanted sewage and gases into your bathroom.

Get Clean

You are an artist and you need to work with a clean slate. Get the wax mess off the flange. Shop-vac the crust and use cleaner and a rag to clean the area. Once you have cleaned the immediate work area, get a bucket to set your scrap in to keep your work site clean.

Take An Assessment

There are a few things you need to look over before you get to the actual repair step.

Cast Iron Flanges

A broken cast iron flange can be a pain to fix properly. Most times the cast iron flange is so thick that the split-type repair flanges are too thin to make an impact, and the full-sized spanner flanges are near impossible to install because cast iron is not easy to drill into. You need to remove the flange and start from scratch.

Concrete Flanges

If you run into a flange that is going into a concrete floor, make sure you screw the new flange in with Tapcons, not drywall-type blanks and screws. The blank anchors will slowly pry up with everyday use of the toilet.

Types of Repair Flanges

There are three main types with the new repair flanges. The blue/red pot metal flange, the PVC flange, and the stainless steel flange. The stainless steel flange is king in my opinion. I have seen too many of the blue/red pot metal flanges less than a few years old rotted away and falling apart.

Miscellaneous Repair Tips

If the hole is too big to screw the new flange down, pull up the wooden subfloor and put a new section in place that is the correct size.

About the Author

Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College.

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