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Old 05-01-2012, 03:54 PM   #1
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Repipe home on slab foundation


I was just wondering, is repiping a home on slab foundation much more expensive than one with crawl space or basement?

And either you do partial repipe, leaving alone the pipe portion under the slab, or you have to tear up parts of the foundation to do the whole repipe for the underground portions?

How much more is the typical cost, if so?

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Old 05-01-2012, 03:59 PM   #2
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Repipe home on slab foundation


Depends your going to have to make some calls on this one.
Does it freeze in your area?
If not you may be able to run it through the attic.

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Old 05-01-2012, 08:12 PM   #3
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Repipe home on slab foundation


I guess my first question would be : " Do you want new water lines, new drain lines, or both?"


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Old 05-01-2012, 08:46 PM   #4
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Repipe home on slab foundation


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Originally Posted by joecaption View Post
Depends your going to have to make some calls on this one.
Does it freeze in your area?
If not you may be able to run it through the attic.
My area rarely freezes in Northern California, Bay Area.

Does that mean the old line is left intact in the home but disconnected so the meter connects to new piping?
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Old 05-01-2012, 08:47 PM   #5
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Repipe home on slab foundation


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I guess my first question would be : " Do you want new water lines, new drain lines, or both?"

I guess both? Was just asking out of curiosity in case I may want/need it.

Though I was primarily thinking of the supply line rather than the drains at the time of the post.
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Old 05-01-2012, 09:21 PM   #6
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Repipe home on slab foundation


The reason I ask is that if you're running drains, the concrete will be open for putting new water lines underneath as well.

I would say any time you have to work with concrete, you are looking at more money.

I'd much rather repipe from an attic, but that of course usually entails a lot more damage to sheetrock.
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Old 05-02-2012, 02:35 AM   #7
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Repipe home on slab foundation


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I'd much rather repipe from an attic, but that of course usually entails a lot more damage to sheetrock.
I wonder how often people (homeowners) do select repipe through attic? Is it common practice?
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Old 05-02-2012, 02:37 AM   #8
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Repipe home on slab foundation


Also what if you have limited attic space? Use wall space and/or repipe with external pipe connections (exposed) outside house (for which you want to insulate, and hopefully not live in freezing climate).

Is repiping with exterior pipes an even rarer occurrence (even in non-freezing regions)?
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Old 05-02-2012, 04:38 AM   #9
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I watched a you-tube video where they tunnelled under the house and hung the pipe with all-thread fastened to the floor above.
The whole time I was watching this all I could think about was how much $$$ the job was well done though.
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Old 05-02-2012, 06:49 AM   #10
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Repipe home on slab foundation


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Originally Posted by daluu View Post
Also what if you have limited attic space? Use wall space and/or repipe with external pipe connections (exposed) outside house (for which you want to insulate, and hopefully not live in freezing climate).

Is repiping with exterior pipes an even rarer occurrence (even in non-freezing regions)?
Repiping design should be with the shortest possible path for the hot water lines to minimize wait times for hot water. Also, with a trunk and branch system, the hot water trunk lines will have to be 3/4" or 1" so round-about routing of trunk lines will make the wait times even longer plus a lot of water wasted.

Running lines outside of the house, even if it never freezes, would probably result in quite long hot water trunk lines with all of the disadvantages, not to mention possibly lowering the value of your home.

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Old 05-02-2012, 06:14 PM   #11
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Repipe home on slab foundation


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Repiping design should be with the shortest possible path for the hot water lines to minimize wait times for hot water. Also, with a trunk and branch system, the hot water trunk lines will have to be 3/4" or 1" so round-about routing of trunk lines will make the wait times even longer plus a lot of water wasted.

Running lines outside of the house, even if it never freezes, would probably result in quite long hot water trunk lines with all of the disadvantages, not to mention possibly lowering the value of your home.

HRG
Understood, I was just wondering. But for the long pipe run for hot water issue, you can compensate with a water return line (dedicated return vs connect hot and cold lines together at fixture).
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Old 05-02-2012, 06:15 PM   #12
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Repipe home on slab foundation


Quote:
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I watched a you-tube video where they tunnelled under the house and hung the pipe with all-thread fastened to the floor above.
The whole time I was watching this all I could think about was how much $$$ the job was well done though.
Ravenworks, do you have the link to the video? I'd like to see it for insight.
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Old 05-02-2012, 06:34 PM   #13
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Repipe home on slab foundation


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Ravenworks, do you have the link to the video? I'd like to see it for insight.
Here it is
They have a very informative website,I was impressed by their job which is hard to do.
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Old 05-02-2012, 09:36 PM   #14
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Repipe home on slab foundation


This is a little test for all the plumbers on this site check out the video and see how many things you can find wrong with that job.??? If you where a plumbing inspector.
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Old 05-02-2012, 10:01 PM   #15
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This is a little test for all the plumbers on this site check out the video and see how many things you can find wrong with that job.??? If you where a plumbing inspector.
I'm kind of claustrophobic, so I'd inspect it from the outside by yelling into the hole "make sure you vent everything"

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