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How to Remove Cast Iron Floor Drain Cap [Easy Steps]

Cast iron floor drain caps are notoriously difficult to remove.

In fact, many people give up and call a professional plumber when they encounter one. 

Did you try to remove it? But failed? 

How to remove the cast iron floor drain cap?

To begin, unscrew the screws that hold its cap in place with a tool. You might be able to remove the drain cap off once the screws are unfastened. If the cap is stuck, you may need to use a pry bar or a screwdriver to gently loosen it.

Also, there are some easy steps. With that, you can easily remove a cast iron floor drain cap without any trouble.

Keep reading to find out everything you need to know!

How to Remove a Cast Iron Floor Drain Cap

It’s not uncommon for a cast iron floor drain cap to become corroded or damaged over time. It may be difficult to extract the cap while causing more damage if this occurs. 

With some patience and the correct tools. It is possible to remove a cast iron floor drain cap without too much trouble.

  • Remove the screws that hold the cast iron floor drain cap in place.
  • Lift off the cap and discard it.
  • Clean any dirt or build-up within the drain pipe with a wire brush.
  • Replace the cap and screws. Make sure they are tight. To keep them from loosening over time

For Rusted Cap

Have you ever had a rust problem with your cast iron floor drain? If so, you’re not alone. Rust can build up on the inside of the drain and make it difficult to remove the cap. 

Luckily, there are a few simple steps you can follow to remove the rust and get your drain working like new again:

  • To begin, use a wire brush to scrape away as much rust as possible. 
  • If the rust is really stubborn, you may need to use a power washer or a chemical rust remover. After you’ve eliminated quite enough rust as possible. 
  • Then use the upper techniques to open up the cap. 

If that does not do anything. Then you can follow these steps:

  • First, use a putty knife or similar tool to pry up the retaining screws that hold the cap in place. 
  • Next, use a wrench or pliers to loosen the bolts that secure the cap to the drain.

If you are confused about which wrench to use, have a look below:

Product 1
Product 2

I hope you find these suggestions useful!

  • Finally, lift the cap off of the drain and set it aside. If there is any build-up on the underside of the cap, clean it off before replacing the cap. 

With a little bit of effort, you can easily remove the cast iron floor drain cap and keep your drains flowing freely.  

For Frozen Cap

One of the most stubborn things to remove is a frozen cast iron floor drain cap. It won’t move no matter how often elbow grease you use. It can be removed without the need for a specialist. 

  • To begin, try utilizing heat. On the lowest setting, use a blow dryer or perhaps a heat gun. 
  • Apply the heat directly to the cap for about 30 seconds. This will help loosen the adhesive that’s holding it in place. 
  • If the cap really didn’t move, try prying it off with a putty knife. 
  • Insert the blade into the space between the cap and the drain and gently twist it until the cap pops off. 

With a little patience, you should be able to remove the frozen cast iron floor drain cap without too much trouble.

For Stuck Cap 

One of the most frustrating experiences can be trying to remove a stuck floor drain cap. There are some methods which will loosen the cap and get it off. 

  • To begin, apply heat to the region surrounding the cap with a blow dryer or perhaps a heat gun. This will help to loosen the rust and make it easier to remove. 
  • Another option is to use penetrating oil, such as WD-40, to help break up the seal. Simply spray the oil on the cap. Then let it sit for a few minutes before trying to remove it. 

With a little perseverance as well as elbow grease. Anyone should be able to remove the stuck floor drain cover in no time.

How to Replace A Cast Iron Floor Drain Cap

At some point, you’re going to have to replace the floor drain cap in your home. Perhaps it’s broken, or maybe it’s just time for an upgrade. Whatever the reason, it’s not a difficult task. 

With a few simple steps, you can have a new floor drain cap installed in no time:

  • Remove the used cap. This is usually accomplished by unscrewing it from the drain. Use a screwdriver or other tool to loosen the cap, and then lift it away. 
  • Once the old cap is removed, take a look at the gasket. You could reuse it if it isn’t broken.
  • Next, clean the drain area and make sure the surface is smooth. This ensures that the entire gasket is properly sealed. Then, simply place the new gasket over the drain hole and screw on the new cap. 

Tighten it until it’s snug, and you’re all done! With these easy steps, you can easily replace a floor drain cap yourself.

If you break the floor tile around the floor drain. You’re wondering about how to tile around a floor drain right now.

How To Remove Rust From Cast Iron Drain Cover

Don’t be worried if your cast iron drain cover is beginning to rust! With a little elbow grease, you can get it looking like new again. Sometimes, the sink drain leaks around threads because of rust.

Here are the steps you’ll need to follow:

  • Begin by scrubbing the rust with a stiff brush. You may also need to use a putty knife to scrape away any stubborn areas.
  • Rinse the area using water then dry it properly once vast of the rust has been gone.
  • A light coating of rust converter should be applied to the afflicted region. This will assist to keep the rust at bay.
  • Allow for thorough drying of the paint before reusing the drain cover.
  • Finally, paint the drain cover with a coat of enamel paint. Allow the paint to dry completely before using the drain cover again.

How to Clean Cast Iron Floor Drain

Cast iron floor drains are an essential part of any drainage system. However, with time, they might get blocked with debris. As a result, drainage will be hampered, and floods may occur. 

Cleansing a cast iron floor drain is quite straightforward and just takes a few minutes:

  • First, clear any debris from around the drain. 
  • Next, remove the drain cover and use a plumber’s snake or other tools to clear any blockages from the drain. 
  • Finally, rinse the drain using hot water to get rid of any leftover debris.

With these steps, you can easily keep your cast iron floor drain clean and functioning properly. If your shower drain is leaking into the basement you can clean it. With the above steps.


How to remove square shower drain cover?

Most square shower drains have a removable cover that is easy to take off. Simply search for the screws but rather bolts that keep the cap in place. The cap might well be glued on in some circumstances. If that’s the case, use a putty knife or perhaps another flat instrument to slowly pull it off. If your drain may not have a detachable cover, you might have to remove the clog with a plunger or snake.

Are toilet drains and shower drains connected?

In some homes, the shower drain may be connected to the same stack as the toilet drain. That means that a blockage in the shower drain could cause water to back up into the toilet. If you’re not sure whether your drains are connected, it’s always best to check with a plumber or other expert.

What are the best ways to unclog a shower drain?

There are a few simple methods that can be used to unclog a shower drain. One of the easiest ways is to simply pour boiling water down the drain. This will help to loosen any soap or hair buildup that may be causing the clog. Another method is to use a plunger. 


Well, there you have it! Everything you need to know about how to remove a cast iron floor drain cap and replace a cast iron floor drain cap. I hope you found this information helpful. 

If you follow these simple steps, your old and rusty drain cover can be good as new in no time.

Remember to take your time and be careful when removing the screws. It would be a shame to strip them.

Best of luck with your project!