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Old 08-18-2011, 05:46 PM   #1
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new plumbing in existing concrete slab/structural question


I am putting a toilet on an exterior wall of a detached garage. The trick is not only cutting the slab, but I am imagining that right about where the toilet drain goes down and tees for fittings to stack in exterior wall etc is smack inside the perimeter footings for the slab. which I imagine to be about 12" wide and 18" deep. Any tips, tricks? thanks!

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Old 08-18-2011, 05:53 PM   #2
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new plumbing in existing concrete slab/structural question


Do you hnow for sure that the detached garage has footings and a foundation wall---or is it a thickened slab.

Let us know what state or country you are in--that will help us determine the footing depth.

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Old 08-20-2011, 11:51 AM   #3
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new plumbing in existing concrete slab/structural question


Fairly positive there is a perimeter foundation fitting. It is in CA circa 1970, single story but probably designed for 2 storys.
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Old 08-20-2011, 11:58 AM   #4
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new plumbing in existing concrete slab/structural question


The only way to see what fits s to open the floor--if you have a sketch of the proposed room and where the drains will hook into the house plumbing--that will get you some good and useful suggestions.

---Mike---

Nice name---not very common---Mike--(One of my daughters has that name)
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Old 08-20-2011, 12:06 PM   #5
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new plumbing in existing concrete slab/structural question


Thanks Mike!
working on a drawing, but I don't know how to attach it.
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Old 08-20-2011, 12:24 PM   #6
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new plumbing in existing concrete slab/structural question


Not afraid of cutting concrete or anything, just not sure how to deal with this foundation. Are we even allowed to cut a slice out of it?
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Old 08-20-2011, 12:52 PM   #7
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new plumbing in existing concrete slab/structural question


You should not have a problem notching the foundation or footing for the new 3" drain.

We have a couple of engineers/ architects/designers here that will have a better idea .

Andy Gump is a California resident --hopefully he will spot this.---Mike---

I edited the title for more attention

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Last edited by oh'mike; 08-20-2011 at 12:55 PM. Reason: changed title
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