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I bought one of the commercially available combo sump and battery backup units that go in the basket. The battery pump is slightly higher than the main pump, so if the main pump fails for any reason, the battery unit kicks in.
I don’t know how long it would keep up, but I figure at least an hour or so and most of our outages are less than that. I should to a test, maybe it would be several hours? Using a big deep cycle battery.
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Rutager West
1977 911S Targa Chocolate Brown
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