Anyone have any hands on experience with battery-backed sump pumps?
Home Depot's got on for $128 that looks promising:
There are combo units:
that are an AC pump and a DC pump preconnected via wye and check-valve to a
single output port. I'm worried about this design, from what I can see,
because I suspect one twig wedged in the float basket will cause it to
require maintenance. I am looking for as maintenance-free a solution as
possible. Currently using an unknown submersible that came with the house
that's failed in sump at the basement stair landing. No room for a pedestal
unit. No interest in generator powered AC units.
This one (Wayne):
does 2880 gph (above pump is only 1000 gph, IIRC) and seems to rely on a
single 12V pump, switching to battery when AC fails. I assume this is more
prone to failure because the entire pumping load is handled by one pump, but
the interconnections between the two pumps in the combo model are potential
failure points as well. I suppose if I wanted a backup I could simply add
an independent AC sump pump.
I'd also like to know if anyone's used the Rigid CPU-1000 - homedepot ID #
100521277 - they generate intolerably long URLs with user ID information
imbedded in them - so no URL - no -wait, here's the user manual in PDF:
This unit uses a capacitance switch instead of a float to activate the pump.
I assume those are more reliable than floats and that the company does as
well since they offer a lifetime warranty on this model. I've had float and
switch problems before in sump pumps, so I'd like to eliminate that failure
vector. If the capacitance switch is just as vulnerable to a twig jam as a
float switch, I'll stick with the float switch. Google groups turned up a
lot of good bypass solutions for the float switch like using Waterbug
sensors, etc, but if I go capacitance, I'd be far more likely to go with a
built in version from the manufacturer.
Any [sane] comments appreciated!