CPVC vs copper under a slab

ridgernr

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with the high cost of copper I am considering using roll CPVC under my slab. I have seen this done in some markets, but, I have been unable to find anything in the local "good ole boy" code. I would expect that irc2003 would be sufficient to get by the inspector. yet, I have not been able to find anything on it there either. is this an acceptable practice currently?
 
Kansas master Plumber

PEX is the pipe to use. I have seen rolled CPVC in use and I personally would not use it .to stiff. PEX pex pex. do not leave it exposed to the sun.
 
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