Frank Davis wrote:

My understanding is that CPVC (chlorinated polyvinyl chloride, I think)
plastic pipe is made for hot water use.  I don't know about temps above
boiling.  Available at most home supply stores.  This may have been what
you used, but you didn't say.  Cheers, Frank

Paul wrote:

I am not going to risk it. I will just use sweat soldered 1.5 inch
copper
pipe and fittings.

BTW the only rad I have come up with so far worth testing is the Suzuki
Swift
or the Geo Metro. Those are the only ones I have found so far near the
right
size. If we need more thickness we can double them up in a back to front
flow 
hot water arrangement. The durabilty issue can be solved by mounting 
them in a ridgid frame.

Paul Lamar
 
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