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Is there a cast iron pipe that has the inside lined with a protective layer of melted glass? (lemmy.today)
submitted 2 months ago by 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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[–] 2 points 2 months ago* (2 children)

You can dissolve glass with sodium hydroxide. No, I'm not making that up, and yes, eventually it would be an issue.

Also sodium hydroxide doesn't really do much of anything to pipes besides acting like a salt. Its not chemically attacking the cast iron, which is actually a pretty good material combo with NaOH.

But to answer your question yeah those kinds of pipes exist but they're used for chemistry or industrial use. You would probably need to custom order them, and have everything perfectly planned out. It also will certainly add at least 3 zeros onto your plumbing bill for materials, tools, and consumables.

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  • [–] [S] -2 points 2 months ago* (1 child)

    most households will not dump hot, concentrated lye down the drain, regularly or even everyday, so no problem :) Thank you for the information

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  • [–] 1 point 2 months ago* (last edited 2 months ago)

    Just an aqeous solution is enough if it sits for long enough at a high enough concentration... like maybe pouring the equivalent of a 10M solution into your drain and letting it sit for 15 minutes, and doing that once every 2 weeks like my mom does...

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