Plastic H2O Line Entering House

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sarg1

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If the water supply entering the house is plastic and the majority of the water lines in the house are non-conductive would the isolated copper supply lines need to be bonded(at the water heater for example)? Treated as other metal piping?
 
Re: Plastic H2O Line Entering House

IMHO the isolated pieces of the metallic water lines do not have a need to be nor are they required to be bonded and grounded. I am interested in some of the AHJs opinion on this one. :D
 
Re: Plastic H2O Line Entering House

I don't think you would call it "other metal piping", but I wouldn't ask for it to be bonded.

250.104(A) would require it, however.
 
Re: Plastic H2O Line Entering House

In my opinion the code does not require "isolated" sections of metallic piping in a generally non-metallic system to be bonded. The code only requires that metallic piping "systems" be bonded. Isolated sections of metallic pipe are not a piping "system".
Don
 
Re: Plastic H2O Line Entering House

I agree with Don. My reason is that 250.104(A) falls under Part V, Bonding. The general statement that begins Part V, in 250.90, talks about safely conducting fault current likely to be imposed. I submit that there is no fault current likely to be imposed upon an isolated section of metal pipe within a primarily plastic piping system.

But at what point is the piping system ?primarily? of one material, as opposed to the other material? How much piping must be metal before we should start treating the piping system as a ?metal piping system?? That is a call for those who, like Ryan, don?t get the bug bucks, just the big responsibility.
 
Re: Plastic H2O Line Entering House

CPVC is common if Florida and we do not bond it.CPVC has been found to out last copper with poor water and far cheaper too

[ August 19, 2004, 05:46 PM: Message edited by: jimwalker ]
 
Re: Plastic H2O Line Entering House

We had this on a house a while back. Our AHU told us instead of going to the cold water line we could lay 20ft of #4 copper underneath the driveway, then go back to the meter.
 
Re: Plastic H2O Line Entering House

Around here the AHJ requires you to bond any copper plumbing over six feet in length (valve assemblies). It is no longer used as a grounding electrode. You are merely bonding the pipe. But one question comes up, If there is not any wiring in the vacinity, what is the potential hazard???

[ August 22, 2004, 10:30 PM: Message edited by: sparkslord ]
 
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