I've been using Schedule 40 PVC since 1976. No static problems, no
buildup to speak of, no explosions, no problems at all. No need to glue
anything or tape anything either. I have mine set up so the collector is
about 15 feet from my pre-collector drum, and everything except the
finest dust, and very little of that, gets to the collector. Most of
that gets filtered out before it hits the fan so about nothing ever hits
the fan, a good thing I think.
The only fire I ever worried about was when I used to smoke. I could
imagine a hot ember being collected somehow and smoldering until hours
later... never happened though. I may have had the table saw smoking a
few times too, that would make me nervous... Static electricity, I
doubt it... I have a hard enough time getting my chain saw started, and
it has vaporized gas and a spark plug, not wood chips and dust:-)
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