Hey all! This is a bit of a follow-up to a post I made a couple months ago regarding our bathroom reno: https://sh.itjust.works/post/56769265

Long story short, the mortar bed subfloor was crumbling away, and I could literally tear up chunks with my bear hands, so we decided to take it all out. I’m going to sister all the joists to re-level the floor, put in blocking for under the clawfoot tub, then 3/4" plywood subfloor, Ditra, and tile. But that’s not what this post is about.

This post is about all that copper plumbing. I think the stuff above the tub spout is relatively new, but I think everything below that (tub supplies, toilet supply, sink supplies) is a lot older, maybe original, which would make that close to 70 years old. Some of it looks pretty crusty and corroded to my untrained eye, so my question is, should I redo any of that copper while I’ve got the wall open? If so, to what extent, and with copper or PEX? I mentioned earlier that we’re putting in a clawfoot tub, so we won’t need basically anything above the tub spout. I know clawfoots traditionally have supplies coming up through the floor, so I may end up reconfiguring to accommodate that, but I’m also considering taking the easy way out there and using some flex hose coming out of the wall.

I don’t have a torch or a PEX crimping tool, so either way I go I’m gonna have to buy a new toy. But which one? How would y’all go about this? Thanks in advance for the input!

  • Schwim Dandy@piefed.zip
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    4 days ago

    If so, to what extent, and with copper or PEX?

    Consider using neither and going with CPVC. It’s install is much more user-friendly, uses practically no special tools and it has a very long and successful track record(use in residential work for over 60 years).

    • zalgotext@sh.itjust.worksOP
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      4 days ago

      Lol I think you’re in a very select crowd of people that advocates for CPVC. I hadn’t considered it because it was pretty regularly recommended against in all the research I’ve done so far

      • Schwim Dandy@piefed.zip
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        3 days ago

        As a thirty plus year plumbing veteran, I’ll gladly defer to your internet searches.

        Lol

        • zalgotext@sh.itjust.worksOP
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          3 days ago

          Internet searches that have turned up a multitude of other thirty year plumbing veterans scorning CPVC. I’m genuinely interested if you have reasons you like CPVC over the other options.

    • thinkercharmercoderfarmer@slrpnk.net
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      3 days ago

      what’s the advantage of CPVC over PEX? I’ve run a few PEX lines off my old copper pipes and didn’t need any expensive tooling, just a ratchet cutter and sharkbite fittings, which were a little expensive but suited my small needs pretty well.

      • Schwim Dandy@piefed.zip
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        3 days ago

        You might have answered your own question. Sharkbites should never be used in a non-accessible environment(think in walls, buried by insulation, etc.) They are incredibly handy for the DIYer but due to their complexity in the clamping mechanism, much more prone to failure than a glued or crimped connection.

        • thinkercharmercoderfarmer@slrpnk.net
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          3 days ago

          Yeah but sharkbites aren’t necessary for PEX, I was just using them for convenience’s sake. Is there a benefit to doing home plumbing with CPVC over, say, PEX-B with crimped connections?

      • trailee@sh.itjust.works
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        3 days ago

        Never trust a sharkbite for long term use. Never seal it behind drywall. It may be code compliant but that’s a disaster waiting to happen.