Thanks Alistair.  I did do some additional checking.  the 180 F maximum temperature rating is enough, as the control temperature for the waterboxer exceeds that, and certainly excursions occur under some conditions.  Thermal expansion of length might be enough to be a problem, also, given the length of the pipes.

mcneely

---- Alistair Bell <albell@shaw.ca> wrote:
> CVPC pipes as a substitute material for coolant lines in the van?
>
> In a word, no.
>
> Take some time to do a quick look up, wikipedia or some such.
>
> (Not so long ago David B. posted why here on this list)
>
> alistair
>
>
> On 8-Mar-11, at 7:03 AM, Dave Mcneely wrote:
>
> > From time to time I have wondered if the PVC piping scheduled for
> > hot water use (designation slips my mind right now, but it is a sort
> > of yellowish color rather than the regular white PVC) would work in
> > this application.  Of course, it would need to have strapping for
> > good support, but so do the original pipes.   In my '91 VW Vanagon
> > GL Campmobile I have the original plastic pipes, renovated with
> > GoWesy end pieces, but for folks with older vans with the original
> > steel, rust prone pipes, this might be a thought.  Lots cheaper than
> > stainless steel pipes, and maybe better than metal for the same
> > reasons that PVC is used in home plumbing almost universally now.
> >
> > mcneely
>

--
David McNeely