EMT needs to be "pickled" with vinegar or acid, to get the paint to
hold. I love it for inland work, but near the ocean, it'll rust
through in 5 years. I'm not sure how much more time paint would buy you.
Anybody use other plastic materials HDPE? Supposed to not have the
expansion problems of PVC.
R. Walters
r...@solarray.com
Solar Engineer
If you have to run around the roof with EMT, you can protect it from
rust
with a coat of paint.
Regards,
-Hans
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