A salutory tale!
I use Whale pumps way above the water
line with vacuum type float switches, in order to remove all electrical parts
from immersion. This has worked well on two boats now, but this summer I woke to find my feet wet as I exited my berth. The reason was a blown hose on a newly fitted fridge compressor
(professionally done, ie I paid someone to do it!) The bilge
pump should have coped, but I had recently fitted bilge water
filters to be ecologically sound, and these had clogged, causing the fuse on the pump to blow. An expensive lesson in being a good citizen. Of course I should have had a bilge alarm
, and I now do have one, but a little too late!