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Old 08-30-2010, 01:28 PM   #1
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Plumbing through a slab


OK, so I did something stupid, and now I need advice on the best way to fix it!

Our house is on a slab, and I ran new water and drain lines for a new kitchen island. This of course required openning the slab which I've since re-poured. What I forgot to do was wrap the waterlines before pouring the concrete... which means I'm worried about them eventually developing leaks as they rub against the concrete.

It's 1/2 copper, and only going to a single sink... so I'm not concerned about losing a bit of inner diameter on the pipe. Is there some sort of inner sleeve that I could run and bound to the inside of the pipe? I'm just looking for something that I can do now before I have issues, and avoid having to re-open the slab.

Thank you for any suggestions.

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Old 08-30-2010, 03:46 PM   #2
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Plumbing through a slab


My suggestion would be to get a good concrete drill bit and drill a bunch of holes around the pipe and then take out just enough material to where you can sleeve the pipes and then fill the holes back with hydraulic cement. This would be short work with a good hammer drill and if you don't have one, I'd bet you could rent one for under $50. Of course be very carefull not to drill into your line. Another option if you have an angle grinder is to get a diamond blade and cut a small section out. I'd be willing to bet with either method, you could be start to finish in under 2hrs and it'd be fixed right.

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Old 08-30-2010, 05:12 PM   #3
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Plumbing through a slab


Thank you Brian, that does sound like a relatively painless and "correct" solution. I guess I know what I'm doing this weekend.
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Old 08-30-2010, 07:44 PM   #4
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Plumbing through a slab


Hope it works well. If you use the diamond blade, just be sure to cover stuff up those things create a lot of dust when done dry, but it'll eat through the concrete like butter.

Come to think of it, you can also get the diamond blades for your skill saw as well.

Good luck!
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Old 08-31-2010, 10:19 AM   #5
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Plumbing through a slab


I'll try the skillsaw... "like butter" has such an appeal!
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Old 08-31-2010, 10:32 AM   #6
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Plumbing through a slab


Just be sure to cover anything important up and wear a mask as it will get dusty!! I haven't done it much, but my neighbor is a mason and I borrowed his to cut some concrete block in my basement. I hate it, but it gets the job done!!!
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Old 08-31-2010, 07:45 PM   #7
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Plumbing through a slab


have someone stand next to you with a squirt bottle w/ water in it. Light misting will really help with the dust. Wear a mask while doing it too
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Old 09-01-2010, 11:50 AM   #8
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Plumbing through a slab


be more careful when you do things like this

los angeles plumber

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