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Hub transition from CI to vitrified clay called...?

delcrossv
delcrossv Member Posts: 2,180
in Plumbing

I see a lot of mission couplings for when there's no clay hub, but what's the donut called to take 4" cast to a 4" clay hub? You'd think there's something like the yellow plastic rings used to connect clay sections together but nothing comes up on Google.

Internet "code" says "preformed bituminous ring" but I see nothing like that on the web.

Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.

Comments

  • delcrossv
    delcrossv Member Posts: 2,180

    Duh. Fernco donuts

    image.png
    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
    Alan (California Radiant) Forbes
  • Intplm.
    Intplm. Member Posts: 2,648
    edited May 15

    @delcrossv Fernco calls it a "Multi Tite" I call it a soil pipe push gasket. Here's a few examples.

    th.jpg th-3.jpg th-1.jpg th-4.jpg th-2.jpg
    delcrossvAlan (California Radiant) Forbes
  • JUGHNE
    JUGHNE Member Posts: 11,436

    I was unlucky enough to crack a 4" cast iron hub trying to get a 3" PVC pipe into a Fernco donut. Maybe the CI had a small unseen crack, IDK.

    I feel I would be more unlucky trying to get that into a clay hub.

  • delcrossv
    delcrossv Member Posts: 2,180
    edited May 15
    https://forum.heatinghelp.com/discussion/comment/1855687#Comment_1855687

    What's the other option? Oakum and cement?

    This looks pretty safe:

    image.png
    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,859

    Hi, How about putting a big hose clamp around the pipe, snugging it up a bit, and then cramming the Fernco into it? 🤠 That's what I do when making any threaded connection to a plastic female adapter.

    Yours, Larry

    delcrossvheathead
  • JUGHNE
    JUGHNE Member Posts: 11,436

    I believe I sawed the hub off and used a Fernco coupling.

  • mattmia2
    mattmia2 Member Posts: 12,935

    I don't think the hub size is standardized on clay pipe, I think you need to measure and find the right doughnut. You can also pack it with oakum and pour and pack lead or oakum and pack it with lead wool or probably oakum and mortar. Make sure you dry out the hub with the torch before you pour the led, if it is wet the steam will cause bad things to happen. You can find a transition fernco that fits over the outside of the hub and over the PVC and put it over the packed joint as a secondary seal. Could pour it all in concrete after you do it too so if the joint fails it is still all essentially contained in a formed in place concrete pipe.

    delcrossv
  • delcrossv
    delcrossv Member Posts: 2,180

    Little worried about packing in lead wool as clay isnt strong under tension. Sure wouldn't be comfortable using caulking chisels on a clay bell. Maybe just flat chisels and hope it's enough. At least with CI you can tell when it's tight as the sound changes when working the chisels.

    The big hose clamp idea is brilliant. Definitely adding that to the toolbox.

    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
    Larry Weingarten
  • mattmia2
    mattmia2 Member Posts: 12,935

    i mean don't just go to town on it, you have to use some judgment about what you're working with. the oakum is what makes the seal, the lead is just there to hold it together.

    delcrossv
  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,203

    I've used oakum & hydraulic cement on Vitrified Clay joints as well. Mad Dog

    Consulting by Mad Dog & Matt Jr.
    delcrossvmattmia2

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