I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!

wrote in message
...
I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!



First time I am hearing about this regarding PVC. There are expansion
couplings available for movement. What kind of conduit do you prefer to use
in the slab? I hope it's not aluminum.

You could install the conduit below the slab.

Tell him to sub duct it in a larger diameter pipe. No problems
wrote in message
...
On Thu, 21 Aug 2008 16:40:55 -0700 (PDT), wrote:

I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!

Why won't he just go under the slab like everyone else?

wrote in message
...
I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!

Never had any problems with non metallic conducts encased in concrete duct
banks, even a few hundred feet between manholes. Common and done every day.

http://images.google.com/imgres?imgu...Den%26sa %3DG

yeah and it's also against the code for the slab itself i believe.

s


wrote in message
...
I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!

wrote:
I have a contractor who insists he wants to bury PVC directly in a
slab. I know this is wrong... the concrete makes both PVC pipe and
cement at fittings brittle, and they fail with the slightest expansion
or contraction. I have looked everywhere on the web for a reference to
substantiate this, but I can find nothing. Can someone please refer me
to such a reference? This is a HUGE issue on this project. Thanks!

What is the PCV going to be used for?

I have service feeds and first floor water pipes (copper) feeding through
PCV in (or through) my concrete slab (my house is 22+ years old).

Hi Guys,

Thanks for your comments, and yes, I should have been more specific.
The contractor wants to put a 1" water line, regular white PVC for
irrigation, buried directly into the slab... there is a LOT of pipe. I
told him he needs to sleeve it or wrap it, but that it can't be in
direct contact with concrete. He says I am crazy. Do any of you have a
code reference, or manufacturers reference, or something I can show
this guy?

Bill

Hi Guys,

Thanks for your comments, and yes, I should have been more specific.
The contractor wants to put a 1" water line, regular white PVC for
irrigation, buried directly into the slab... there is a LOT of pipe. I
told him he needs to sleeve it or wrap it, but that it can't be in
direct contact with concrete. He says I am crazy. Do any of you have a
code reference, or manufacturers reference, or something I can show
this guy?

Bill

Fretwell's right; YOU are the one paying for the job and it's to meet
your requirements as long as it doesn't violate code.

Now: Have you contacted your own local zoning and code enforcement
offices? If not, why not? Thát is always the logical places to start
with; they may have local rules for that exact thing or at least be able
to give you info about it.