I think the steel pipes last long enough that it isn't worth putting in anything else. The steel pipes under my 20-year-old Vanagon only have rust where they're clamped near the front. I'm hoping if I touch that up with some POR15 it'll keep it from going through. Even if I eventually have to replace them, I'd expect the replacements to last until the rest of the van has turned into dust. It might seem counter-intuitive, but steel tends to last a long time in cooling system applications. The chemistry of protecting it is pretty well understood and it's not as reactive as aluminum or solder. _ _ __ _ _ _| | | | David M. Brodbeck (N8SRE) Ypsilanti, MI / _` | | | | | | +----------------------------------------------------- | (_| | |_| | | | @ cyberspace.org \__, |\__,_|_|_| "The VW camper is a brilliant invention -- it's like a |___/ Swiss army knife for the road... It's the stealth RV." -- Wayne Curtis |
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