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A vacuum test sounds like a way to check for a pin hole leak, but seems
like a lot of work. A pin hole at 250 feet will squirt some water maybe, or more
likely drip some, but if you welded the fittings, hull, tower, etc. your self
you should know if it's screwed up. I'm not sure a shop vac test for leaks is
all that useful.
Deep water testing un-manned via cable and/or remote control is still going
to be required, and it's quite possible a pin hole leaking at depth wouldn't
leak at 2 feet or with a shop vac. Nice little exercise though if you've got
time on your hands.
Brent: are you hot dipping the entire hull ? I love that idea, but it
sounds expensive. Got any more info on this? Frank D.
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