How to raise height on old cast iron floor drain

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bradlymathews

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I will need to raise the height of two floor drains at my preschool after doing some tile work over Xmas break. They are cast iron. I will need to raise them about 1". Can I get something to slip into this and adjust the height? Or is it realistic to remove that flange and replace it with something and what do I replace it with exactly?

I have done a fair bit of plumbing over 3+ decades, but commercial floor drains are new to me.

Thanks for any feedback or inspiration!

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Breplum

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I'm sure you will need to break out the entirety to get a new drain in properly and that means membrane will have to be redone. Huge job.
 
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