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Old 09-03-2015, 08:59 AM   #1
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Plumbing under slab for new shower.


I've got a contract to buy a 1970 slab-on-grade ranch in Virginia Beach with 1.5 bathrooms. The 1/2 bath is in the master. Hoping to somehow squeeze a shower in there. That has me wondering about the new plumbing that needs to go through and below the slab. Can the shower drain tie into the existing toilet drain sub-slab? Does shower drain have to be vented? How do you ID exiting utilities before cutting into the slab. Is there a good video to watch. Thanks.
Posted in Remodeling as well. Not sure which is more appropriate.
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Old 09-03-2015, 09:42 AM   #2
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All drains should be vented
You should find out if your slab is , "pre tensioned". Cutting into the rebar can cause issues with those slabs.
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Old 09-03-2015, 10:55 AM   #3
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Thanks for the reply. Good call regarding slab, but I think you mean post tension slab, not pre-tension. I did some reading on post tensioin slab. Couldn't find any info regarding pre-tension slab, but found some regarding prestressed concrete. Will continue the research and will look at garage floor to see if there is a "post tension" stamp warning of no drilling allowed.
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Old 09-03-2015, 12:21 PM   #4
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Quote:
Originally Posted by LarryJ-nova View Post
Thanks for the reply. Good call regarding slab, but I think you mean post tension slab, not pre-tension. I did some reading on post tensioin slab. Couldn't find any info regarding pre-tension slab, but found some regarding prestressed concrete. Will continue the research and will look at garage floor to see if there is a "post tension" stamp warning of no drilling allowed.
Seems I got a little ahead of myself.
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