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amakarevic 03-24-2008 05:46 PM

burying CPVC under concrete
in my municipality CPVC is legal while PEX is not.

Q1: is it (generally) legal to bury CPVC under concrete WITH JOINTS ?

Q2: since i am scared of water supply pipe with or without joints breaking and water saturating the ground, is it feasible to install a small test meter (if such a thing exists) on the line before it goes under ground which would indicate flow in case of breakage ? i would also install a valve next to the meter to disable it in case a breakage is indicated.


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USP45 03-24-2008 05:59 PM

I have never tried CPVC under concrete. Usually heavy guage copper with insulation

amakarevic 03-24-2008 06:03 PM

what can be a downside of CPVC under concrete ?

do you bury copper joints ?

USP45 03-24-2008 06:11 PM

I just do not trust the strenth and the durability of the CPVC. heavy guage copper even with joints covered with insulation should be around for quite some time.
You may want to waite and see from Ron the Plumber, he usually pops in and out. I dont know his opinion on it, but like I said, I never done it and will not do it just because I have seen it break before.

amakarevic 03-24-2008 06:17 PM

what do you mean by "heavy gauge copper" ? L-pipe or the size (e.g. 1 inch or more) ?

Marlin 03-24-2008 06:24 PM

For a test meter simply shut off all the water in the house and look at the water meter. If it's moving you have a leak. There should be shutoff valves at the meter.

amakarevic 03-24-2008 06:27 PM

i do not have access to my municipal water meter, it is inside a manhole in front of the house.

there has to be a small test meter of some kind that is threaded/soldered.

Marlin 03-24-2008 06:29 PM

Is it a small manhole with a five sided nut on it? If it is just take a pair of channel locks and loosen that nut. Or you could buy a wrench for it.

Ron The Plumber 03-24-2008 07:01 PM

I don't think you can have cpvc joints under a slab, not here anyways, pex or copper is the way to go, I use pex, no joints needed. If joints in copper under a slab, then the joint/s have the be brazed.

amakarevic 03-24-2008 07:20 PM

how do you braze copper ? is it pretty-much the same as soldering but hotter ?


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Ron The Plumber 03-24-2008 07:29 PM

Yes hotter and the use of brazing rods.

amakarevic 03-24-2008 07:36 PM

what do you think i will need in terms of equipment (how much $ roughly) and do you think it is within the DIY domain ? i am very proficient at sweating.

Ron The Plumber 03-24-2008 09:16 PM

It's not sweating pipes it's called welding pipe when you braze, it takes high heat, can be done with mapp gas, but using an oxy-acetylene torch will give you the heat needed to braze. Fitting and pipe need to get red hot before rod takes to the copper.

amakarevic 03-25-2008 07:23 AM

is it worth getting an oxy-acethelene torch you think ?

amakarevic 03-25-2008 07:45 AM

can MAPP gas be used to silver solder copper pipe ?
i am trying to avoid buying an oxy-acetylene torch.

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