Repairing Cast Iron Waste Line?

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Old 04-14-05, 06:37 PM
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Join Date: Dec 2001
Location: middleboro,ma
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Question Repairing Cast Iron Waste Line?

Hi,
I own a older (1910) three family home.Two years ago I was in the unfinished
basement,and noticed some water dripping from area of main waste line .
I called a plumber,who found the rotted cast iron area in above the 1st floor bathroom ceiling,wich is a suspended ceiling.
He patched it with a 4" dia rubber coupling he cut,put silicone inside it,and used clamps.He said it was a temp fix,and eventually the whole line should be replaced during a re-model,etc.
It has been fine for a couple of years,but now I notice the waste line in the basement in wet again?A suspect another similar leak?
The leak was in an area with a fitting with alot of branches off.
I am going to climb up there in the ceiling again to check it out,but is there any other tricks to help seal leaks in C.I. waste lines?I know I need to spend major money someday,but any ideas to help now?Thanks
 
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Old 04-15-05, 06:24 AM
trance's Avatar
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Join Date: Aug 2003
Location: usa
Posts: 406
I've had good luck repairing cast iron lines with plumbers epoxy - you can buy it at the big box stores - you just mix it in your hand (like dough) and push it into the leak/crack. makes a temporary fix - but I've got one line going on 2 years w/no problems yet. works best when you can see the hole!!!
 
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