| Author |
hairline crack (with very slow drip) in cast-iron drain pipe.
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| blueman 2005-07-15, 4:25 am |
| We have an old cast iron drain pipe (maybe 100 years?) going from the
main vent stack to the city drainage system.
I just noticed a damp spot underneath an area of the pipe and a
corresponding light wetness along the bottomside of the pipe. Looking
more closely, there was an irregular hairline crack in the pipe,
extending perhaps 2-3 inches.
The discharge is (currently) clear and odorless and is truly minimal
-- i.e. you can't even see drops dripping it is so slow.
So, short of replacing the pipe, what can i do to fix it?
Thanks
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| Mikepier 2005-07-15, 12:25 pm |
| Try to repair it with epoxy or JB Weld. It should repair it. Otherwise
worse case, you can just replace that section of pipe with PVC and 2
no-hub clamps.
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| >Try to repair it with epoxy or JB Weld. It should repair it. Otherwise
quote:
>worse case, you can just replace that section of pipe with PVC and 2
>no-hub clamps.
--------
JB Weld is OK. Make sure the crack is dry through and through first.
A higher quality fix would be to actually weld in a patch. It depends
on how much peace of mind you want.
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| Could it be condensation?
What about using one of those no hub connectors as a patch. Would reqire
cutting the coupling. For such a very small leak may do fine and is cheap
and quick.
"blueman" <NOSPAM@nospam.com> wrote in message
news:m2k6jsg21x.fsf@consult.pretender...
quote:
> We have an old cast iron drain pipe (maybe 100 years?) going from the
> main vent stack to the city drainage system.
>
> I just noticed a damp spot underneath an area of the pipe and a
> corresponding light wetness along the bottomside of the pipe. Looking
> more closely, there was an irregular hairline crack in the pipe,
> extending perhaps 2-3 inches.
>
> The discharge is (currently) clear and odorless and is truly minimal
> -- i.e. you can't even see drops dripping it is so slow.
>
> So, short of replacing the pipe, what can i do to fix it?
>
> Thanks
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| kevin 2005-07-15, 12:26 pm |
| Even better than the no hub connector, just get one of those rubber
clamp-on patches. It is just a big rubber sheet, basically, with a bar
on each end, that wraps around the pipe. The bars come together and are
screwed tight.
-Kevin
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| blueman 2005-07-16, 4:25 am |
| Abe <noone@nowhere.com> writes:
quote:
> --------
> JB Weld is OK. Make sure the crack is dry through and through first.
>
> A higher quality fix would be to actually weld in a patch. It depends
> on how much peace of mind you want.
I am not as worried about the current minimal leakage through the
hairline crack (even duct tape seems to control that minimal level  .
Rather, I am worried about whether the crack itself will continue to
spread and lead to a more catastrophic failure of the main drain pipe.
Would JB Weld be sufficient to prevent further destabilization of the
pipe's integrity or is the hairline crack really just a symptom of a
much more significant materials failure and a warning sign of an
impending blowout?
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