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Re: Bilges - On vs. Automatic; Capacity?
A slow leak will first empty the battery via your lower bilge pump, and leave no power or alarm or second pump.
Two pumps, one higher than the other, both on auto. Another float switch connected to a LOUD alarm that will trip before the second pump activates. Alarm should sound in cockpit too. Gets your attention while sailing and your neighbor's while you're away.