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Old 09-20-2012, 04:04 PM   #1
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Plugging old pipes


I'm currently renovating my basement. In one of the rooms I have 4 old pipes that by the sounds of them are still connected to the sewer line. These are not in use anymore. I'd like to seal them permanently to prevent any water from backing up through them, and also to block the noise of the flowing water that can be heard coming from these pipes. I'm curious as to the best way to do this? The pipes are made of some type of soft metal. 3 of them are about 2 inches in diameter and one is about 4 inches in diameter. I'd like to plug all of them.

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Old 09-20-2012, 06:06 PM   #2
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Plugging old pipes


Sounds like you're describing lead pipes which haven't been installed for ages.
They will not stay round so there is not a cap available that I'm aware of- others might know.
Can you remove it back to the cast iron? cast iron is easy to cap off.
I suppose you could pinch the end shut and then solder it.... but that would take some skill working with lead is tricky

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Old 09-20-2012, 06:11 PM   #3
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Plugging old pipes


Can you post a picture?
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Old 09-20-2012, 09:48 PM   #4
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I will get a picture tomorrow. Lead sounds about right. Can I fill the pipe with something strong enough to prevent water backing up? I was thinking maybe some spray foam or cement but I'm not sure that either of those would stop water completely.
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Old 09-20-2012, 10:06 PM   #5
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Plugging old pipes


Quote:
Originally Posted by alexlacelle View Post
I will get a picture tomorrow. Lead sounds about right. Can I fill the pipe with something strong enough to prevent water backing up? I was thinking maybe some spray foam or cement but I'm not sure that either of those would stop water completely.
Probably wouldn't seal. Work on a picture so we can give you some good ideas
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Old 09-21-2012, 12:27 PM   #6
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Here are some pictures...









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Old 09-21-2012, 12:30 PM   #7
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That's lead. Are these in your walls or floor?
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Old 09-21-2012, 12:31 PM   #8
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They're all in the floor
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Old 09-21-2012, 12:51 PM   #9
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Plugging old pipes


Pack them tight with news print leaving as much space at the top as possible. Wet the news print so it will swell and seal along the pipe walls for a product called Rockite that is to be mixed with water to about the consistency of pancake batter and poured in the pipe until full. It is a type of hydraulic cement that expands while curing and will seal the irregularities in the pipe. You can purchase it at most home centers with mixing instructions.
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Old 09-24-2012, 08:53 AM   #10
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Plugging old pipes


Thanks for the info. Will be getting this done in the next couple days.

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