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copper tubing under cement... johnnyzero 08-14-2005
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Posted by johnnyzero on August 14, 2005, 7:31 pm


Hi,

I'm gonna be replacing the 60-yr-old 3/8" copper tubing that runs
through our concrete basement floor from the oil tank to the burner.
I'm gonna chisel out the old stuff, clean-up the channel, and then
re-bury the new tubing with concrete.

Anyway, from what I understand it's advisable to first encase it in
some type of outer plastic tubing or conduit to prevent corrosion
(that's why I'm replacing the stuff that's there). Any recommendations?

Thanks,
JohnB



Posted by Abe on August 14, 2005, 10:08 pm



>I'm gonna be replacing the 60-yr-old 3/8" copper tubing that runs
>through our concrete basement floor from the oil tank to the burner.
>I'm gonna chisel out the old stuff, clean-up the channel, and then
>re-bury the new tubing with concrete.
>
>Anyway, from what I understand it's advisable to first encase it in
>some type of outer plastic tubing or conduit to prevent corrosion
>(that's why I'm replacing the stuff that's there). Any recommendations?
I would think that 1/2" Sched 80 PVC would be OK, so long as the temp
never gets above 140 deg. near the burner.


Posted by johnnyzero on August 15, 2005, 5:53 am


Thanks for the info, guys. Actually, I already have my new tubing
running ACROSS the floor for now so that we have hot water in the
meantime, so I don't wanna have to buy more tubing that comes with the
cover. Also, the channel isn't a straight line - so rigid PVC isn't
really an option.

I probably can just get some type of plastic tubing/hose of the proper
diameter and slip it over the copper before I cover it w/ concrete. The
20-year-old kid who works in the Plumbing/HVAC aisles at my local Home
Depot actually is quite knowledgeable, so I guess I can just ask him
what type would work for me.

Thanks again!
JohnB



Posted by Wes Stewart on August 15, 2005, 6:40 am


wrote:

>Thanks for the info, guys. Actually, I already have my new tubing
>running ACROSS the floor for now so that we have hot water in the
>meantime, so I don't wanna have to buy more tubing that comes with the
>cover. Also, the channel isn't a straight line - so rigid PVC isn't
>really an option.
>
>I probably can just get some type of plastic tubing/hose of the proper
>diameter and slip it over the copper before I cover it w/ concrete. The
>20-year-old kid who works in the Plumbing/HVAC aisles at my local Home
>Depot actually is quite knowledgeable, so I guess I can just ask him
>what type would work for me.

Here in AZ where houses are slab-on-grade, copper water piping is
wrapped with tape made for the purpose. There is also a primer
available that seems to be pretty much additional adhesive.

And, you never want a joint under concrete.


Posted by TURTLE on August 14, 2005, 11:52 pm



> Hi,
>
> I'm gonna be replacing the 60-yr-old 3/8" copper tubing that runs
> through our concrete basement floor from the oil tank to the burner.
> I'm gonna chisel out the old stuff, clean-up the channel, and then
> re-bury the new tubing with concrete.
>
> Anyway, from what I understand it's advisable to first encase it in
> some type of outer plastic tubing or conduit to prevent corrosion
> (that's why I'm replacing the stuff that's there). Any recommendations?
>
> Thanks,
> JohnB
>

This is Turtle.

You can get K type Soft Copper tubing with a plastic cover to lay in concrete.
Lay it and forget it.

TURTLE




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