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Re: underwater spray bar flood

Try drilling a hole in the vertical pipe just below
the tank waterline.  Brush it off/out regularly to
avoid clogging.  In case of a power down situation,
the hole will suck air and break the siphon to
minimize tank water loss.  The sump operating level
obviously should be maintained at a level sufficient
to absorb any drain down from the display during
outages.  Test this.