Patching No-hub Cast Iron

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TomSt

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In the process of cutting and jack hammering a concrete slab to facilitate relocating a toilet, we hit the existing no-hub cast iron drain line. I patched it with JB Weld FiberWeld, which is basically fiberglass and epoxy. I was quite pleased with the result and thought I would share. I think this FiberWeld is the same material that is used to line failing cast iron pipes. It is airtight, water tight, and mechanically solid.

Attached are before and after photos. The patch is not super neat, because it's a bit hard to work with the fiber with sticky resin. But nobody's going to notice with 4" of concrete on it.

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Tuttles Revenge

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That submarine that imploded on the way to the Titanic comes to mind here.. A product that is strong for one certain force, may not be strong for the other opposite force. The patch may keep dirt from entering the pipe, but it won't seal waste from exiting if the drain becomes backed up.
 

Breplum

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I have saved a few problem situations by using the patch material to bridge just the hole, then, use a good sticky paste epoxy to float over the cast iron.
Mostly on commercial storm water lines, rarely on sewer.
 

Sylvan

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I often wondered which plumbing code / inspector would approve of of such shoddy work???
 

Jeff H Young

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lets hope an inspector would have integrity to stop it, only a few would allow that , Id guess some would just sign card and assume the tradesman would fix it with out mention. I dont care if its a DIY or a Pro, that should only be temporary and no concrete poured owner should be aware and not pass that on to an unknowing sucker.
 
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