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Old 02-23-2011, 10:19 PM   #1
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Leaking Drain Stack


Hey all. I've discovered a leak in my basement, coming from the drain stack that serves my kitchen. The line transitions from galvanized to cast iron( I think). There is a clean out near the floor and then finally the pipe goes into a larger diameter fitting and is sealed in by a cement type product. It seems that this cement seal has failed and that is where the water escapes. Any thoughts on how to correct this? There are epoxy products like "Water Weld" and such and I thought perhaps if you removes as much cement as possible that could be used to fill it in. Any and all ideas are appreciated, thanks! see attached image btw.
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Old 02-24-2011, 05:22 AM   #2
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Leaking Drain Stack


The cement type product is probably lead that is what is used on cast iron. I can't really tell from the picture but a leak at vertical to horizontal transition frequently indicates a restricted sewer. When the water backs up it takes the past of least resistance

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Old 02-26-2011, 03:06 PM   #3
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Leaking Drain Stack


I should add that it only leaks during and immediately after water is running down the stack. Also, the main stack closer to the sewer isn't backing up, does that probably mean an obstruction between the leaking stack and the main one?

Would you guys recommend accessing the cast iron cleanout to snake the drain, or is that gonna be risky? It looks basically sound although a little corroded. I don't want to risk cracking any of the iron.
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Old 02-26-2011, 04:59 PM   #4
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Leaking Drain Stack


Make it an easy repair replace the vertical section with abs, just be sure to add supports to the piping above where you cut. I would cut using a mini grinder just below the hub joint.
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