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[quote=Anonymous][quote=Anonymous][quote=Anonymous]Fyi battery backups don't last that long - only 6-8 hours. The water pressure system is more expensive, but can run indefinitely during a power outage.
[/quote]That's not true at all.  A typical one will be rated for 7 hours of run time.  That's total run time.  They typically run about 10 seconds at a time, until the basin fills up again.  It can run for several days, if not a week at that rate.  Water powered back-ups are a very bad idea and waste a LOT of water to run the pump.  Can't be used with well water, obviously.[/quote]

No they are not a bad idea. They are much more reliable than a battery. And a typical crock takes 60 seconds to empty, not 10. The battery backup also doesn't power the main pump. It runs a much smaller pump that is easily overpowered during heavy rains.

It is true that municipal water powered pumps use city water to drain the crock (about one gallon of city water to pull two gallons from the crock) but they drain as quickly as your main pump, can't be over powered and essentially never fail. Most people are fine with spending $0.12 in water to keep their basement dry during a power outage. Keep in mind that deep cell marine batteries used to power battery back up pumps run about $300 and last for 5 years at best, more like 3 years usually. You'd have to run the water pump for three months straight to use $300 of water where I live.[/quote]

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