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Old 01-19-2012, 01:00 PM   #1
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PVC pipes in new concrete slab


I plan to pour 4" concrete slab for a new house in Dunlap, TN (near Chatt.). I will have a tub, toilet and sink in the bathroom, a washing machine beside the water heater and a sink in the kitchen. Can I tie all the drains from these together? I desire to lay the PVC in the ground before pouring the slab. How much slope do I need for the drain pipes? Is any type of venting required ( no code requirements ). The drains will go into a city drain, not a septic tank.

Are there any special requirements for the drain the toilet will sit upon? Thanks for any advise!

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Old 01-19-2012, 01:22 PM   #2
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PVC pipes in new concrete slab


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Originally Posted by ChiefVOL View Post
I plan to pour 4" concrete slab... I will have a tub, toilet and sink in the bathroom, a washing machine beside the water heater and a sink in the kitchen ...

Are there any special requirements for...
There are all sorts of "special requirements" for all manner of things.

Quote:
Can I tie all the drains from these together?
It all depends on HOW you do it (see those "special requirements").

When you're done it should look something like this:
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PVC pipes in new concrete slab-under-slab-sans-grey-water.jpg  

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Old 01-19-2012, 01:36 PM   #3
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PVC pipes in new concrete slab


This is a one shot deal, done wrong and your in deep dodo.
Hire a plumber to at least do the rough in.
Hire a real concrete finisher.
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Old 01-19-2012, 03:39 PM   #4
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PVC pipes in new concrete slab


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There are all sorts of "special requirements" for all manner of things.

It all depends on HOW you do it (see those "special requirements").

When you're done it should look something like this:
Thats a pretty decent layout but throw some dirt on top of those pipes.
I like to see 2-3" of good clean dirt between pipes and concrete myself. Concrete will work its way through rock pretty easily making things tough down the road if repairs are needed.
Also wrap you pipes with "sill seal" where they pass through concrete.
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Old 01-19-2012, 04:09 PM   #5
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PVC pipes in new concrete slab


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This is a one shot deal, done wrong and your in deep dodo.
Hire a plumber to at least do the rough in.
Hire a real concrete finisher.
Unfortunately, I plan on doing all the work myself. With all the professional advise I plan on receiving here, I hope to succeed. With proper placement of the upturns on each individual PVC pipe and proper glueing, I think this is straight forward. I will determing the proper size for each drain pipe (help). I suppose I am naive about finishing the concrete slab myself. I will obtain some help in finishing - probably in forming as well. I will be installing a dry-stack cinder block wall directly on top of the slab - again by myself. Please alert me as to specific problems I might encounter installing the pre-plumbing.

Thanks a bunch
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Old 01-19-2012, 04:12 PM   #6
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PVC pipes in new concrete slab


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Thats a pretty decent layout but...
Not my work. First image google offered me that was close to the idea I wanted to convey.

ChiefVOL: Hire a REAL plumber. Let HIM call the shots.
Offer to be his bull labor trench digger and dummy end of tape holder.

This level of work is not for a rookie learning their way.
Hint: The DIYers who could answer your questions will mostly choose to hire it out.

Besides which the "technical" time you need to pay for isn't that many hours.

Last edited by TarheelTerp; 01-19-2012 at 04:16 PM.
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Old 01-19-2012, 04:13 PM   #7
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PVC pipes in new concrete slab


Quote:
Originally Posted by plummen View Post
Thats a pretty decent layout but throw some dirt on top of those pipes.
I like to see 2-3" of good clean dirt between pipes and concrete myself. Concrete will work its way through rock pretty easily making things tough down the road if repairs are needed.
Also wrap you pipes with "sill seal" where they pass through concrete.
Thanks Plummen, What size drain pipes do I need for the toilet, sinks, tub and washing machine?
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Old 01-19-2012, 04:15 PM   #8
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PVC pipes in new concrete slab


Quote:
Originally Posted by TarheelTerp View Post
Not my work. It was the first image google offered me that was close to the idea I wanted to convey.

ChiefVOL: Hire a REAL plumber. Let HIM call the shots.
Offer to be his bull labor trench digger and dummy end of tape holder.

This level of work is not for a rookie learning their way.
Hint: The DIYers who can answer your question will mostly choose to hire it out.
Thanks, Yea that makes sense - shouldn't take long if I have the material on hand, trenches dug, etc.. You are right - it's a one shot deal
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Old 01-19-2012, 04:15 PM   #9
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PVC pipes in new concrete slab


Quote:
Originally Posted by TarheelTerp View Post
Not my work. It was the first image google offered me that was close to the idea I wanted to convey.

OP: Hire a REAL plumber and be his bull labor.
Let HIM call the shots.
Thats good,I didnt want to ask about those 2 45s coming off that 4" wye!
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Old 01-19-2012, 04:19 PM   #10
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PVC pipes in new concrete slab


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Thanks Plummen, What size drain pipes do I need for the toilet, sinks, tub and washing machine?
Do you have access to fax machine?
Im no good at drawing lines on a computer,but if you can fax me a copy of your rough floor plan and dimensions I can fax you the pipe sizes
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Old 01-19-2012, 04:19 PM   #11
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I now completely confident in your advise Plummen
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Old 01-19-2012, 04:21 PM   #12
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PVC pipes in new concrete slab


I am poor - no fax. I have been trying to design the floor plan myself. Don't have any good software. I will see if I can figure out how to attach my document here - I haven't seen a way yet. Since you on a computer, is their a way for me to email you my floor plans. My email is Jamesa.stclair@yahoo.com - this way you only have reveal your address to me. My diagram is to scale - at least as good as I can achieve. This is really nice of you Plummen!

Last edited by ChiefVOL; 01-19-2012 at 04:26 PM. Reason: more info
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Old 01-19-2012, 04:23 PM   #13
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Im retired now for the 2nd time,but i still do lots of stuff mostly because i dont know how to play golf like all my retired buddies!
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Old 01-19-2012, 04:25 PM   #14
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PVC pipes in new concrete slab


If you can figure out how to post your floor plan and the dimensions of the house/rooms,we can size it up for ya!
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Old 01-19-2012, 04:30 PM   #15
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PVC pipes in new concrete slab


Plummen, My email is Jamesa.stclair@yahoo.com. If you will send me your address, I will send my floor plan document to you. It is to scale - as best as I can do. I really appreciate your time and effort!

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