1) Fill the water enough and it'll start automatically
2) Yes, it can - I've not experienced the issue, but the small system I wsa running isn't up anymore. The new one, which I purchased from a board member, has never been an issue.
3) I'll tell you next week, I'm going to be pushing about 50 - 70 gph up from the sump - will that be enough to keep things flowing? Who knows.
4) Again, not sure - but depending on the design, it would make sense that it wouldn't be MUCH louder than a standard overflow. As long as the water level remains the same, it should be okay.
5) If you have a venturi into the u-tube, that should go a long way to keep things going as soon as the power starts again. I think you might be tempting fate to do the off/on thing, though. It could just be extra risk that you really don't need to take... But I understand, mine is in the bedroom and it's going to be, well, interesting.
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