All,

I just bought a house with a redundant battery operated sump pump
installed (brand name is "Ace in the Hole"). I decided to test it out
by unplugging the main AC unit. The pump made noise like it was
running but didn't pump any water out. The date on the battery says
it is only 4 months old. I checked the battery water levels and they
were all ok.

Any ideas? Does it sound like a bad pump? I should mention it has
its own pipe running from the pit to the outside, so maybe the pipe is
plugged?

Thanks,
Dan