Is there a cast iron pipe that has the inside lined with a protective layer of melted glass? (lemmy.today)

submitted 4 days ago by Sparky@lemmy.today to c/plumbing@lemmy.world

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Many modern drain cleaners, like Draino, contain harsh chemicals that can dissolve and corrode cast iron pipes over time, so is there a cast iron pipe that has a protective layer of glass on the inside? Glass sand can be applied to the cast iron, which is then heated that melts that glass, and rolled so that the melted glass coats evenly on the inside of the iron pipe. This glassy layer will protect against corrosive chemicals.

Thank you for your interest and attention.

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[-] Iconoclast@feddit.uk 2 points 4 days ago

At least where I live cast iron pipes are lined with epoxy coating. The content of the pipes is never in contact with cast iron directly except for the non-factory ends if they've not been painted after cutting.

Also, in my experience those consumer grade drain cleaners do nothing and there's no reason to for anyone to use them.

this post was submitted on 24 Aug 2026

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