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Old 01-14-2017, 08:48 AM   #1
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Help finding rough in plubing in basement slab


Im trying to find a waste pipe to tap into for a new tub I'm installing in our basement that has a 4" concrete slab. House is 8 years old.

The red dots are drains that i have at the moment and have access to, the blue dot and line is where i need to install the new tub drain.

Yellow lines are me guessing where the pipes run.

Drain 5 (3"pipe) comes down in a partition wall from the upstairs sink but then comes out (they obviously roughed it in slight out when then built the house) of the partition and into the concrete. This would be idea but as its under the partition im not sure i can dig out enough to get to it underneath. If that pipe goes down vertical far enough i maybe can but if it goes like i think following the yellow line then its gonna have a 90' bend on it and run under the partition back towards the soil stack

The second picture is looking at the drain 5 in the direction of the arrow.
Would appreciate anyone's thoughts on this and the best way to find the pipes and run the new drain.





thanks again
Si

Last edited by Fcat; 01-14-2017 at 08:52 AM.
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Old 01-14-2017, 08:54 AM   #2
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Re: Help finding rough in plubing in basement slab


Run hot water through to determine if a infrared thermometer or camera will pick up a temperature difference at the floor surface.
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Old 01-14-2017, 08:55 AM   #3
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Re: Help finding rough in plubing in basement slab


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Originally Posted by SeniorSitizen View Post
Run hot water through to determine if a infrared thermometer or camera will pick up a temperature difference at the floor surface.
Thanks for the reply, would that really work with a 4" slab plus soil etc ? i will certainly give kit a go

Last edited by Fcat; 01-14-2017 at 08:57 AM.
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Old 01-14-2017, 09:02 AM   #4
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Re: Help finding rough in plubing in basement slab


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Thanks for the reply, would that really work with a 4" slab plus soil etc ? i will certainly give kit a go
That's the best I can do for now unless a tracer wire was run with the pipe or a penny was glued to the pipe about every foot so a metal detector could locate it.
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Old 01-14-2017, 09:53 AM   #5
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Re: Help finding rough in plubing in basement slab


FCAT.....

I've had the very same problem for some additions......

I rent a Shonstedt metal detector and snake a small magnet thru existing drains. Works like a charm.

These detectors are very pricey to buy (range of $500 to $1000+). I don't think normal rental yards have them... maybe.... but I got mine from a surveying instrument shop.....

Or maybe a surveyer will just come buy and check for you.

Good luck
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Old 01-14-2017, 11:54 AM   #6
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Re: Help finding rough in plubing in basement slab


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Originally Posted by MTN REMODEL LLC View Post
FCAT.....

I've had the very same problem for some additions......

I rent a Shonstedt metal detector and snake a small magnet thru existing drains. Works like a charm.

These detectors are very pricey to buy (range of $500 to $1000+). I don't think normal rental yards have them... maybe.... but I got mine from a surveying instrument shop.....

Or maybe a surveyer will just come buy and check for you.

Good luck
Thanks, i know Home Depot dont do anything so will check out a few places around and see what i can find. this sounds like a sure fire way though
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