Tim Fischer wrote:
I installed a "basement watchdog" brand after a power-falure scare
(water was right up to the top of the sump when the power came back
on). It claims that it can run continuously for 24 hours. Since my
pump would never need to run continuously (it can clear the sump in
about 30 seconds) I should get several days out of it.

I've never needed it for an emergency yet, but it was very cheap
insurance (about $150, installed myself). Since it's a completely
separate pump, it will also work if my main pump has mechanical
failure.

You may want to consider that most, if not all, battery powered pumps
are lower volume than the standard pumps most people have. That means it
will need to run longer to do the same job. Of course lower power means the
battery will last longer, but the ultimate result is that it likely will
handle you usual problems and will offer more protection than not having it.
It also can be useful when you still have power but the regular pump fails.

I did have my original pump fail (also sensors and switches can fail)
and I was lucky enough to happen to look in the sump and notice the water
level was up. I now have a new much quieter and higher capacity pump than
the original contractor special.


The water-based backup systems weren't a good option as my sump isn't
anywhere near a water line. I also didn't like the idea of wasting
all that good water, plus I've heard horror stories where people
actually flooded their basements with city water when a check valve
failed...
-Tim

--
Joseph Meehan

Dia duit