I've been using the Water Witch for several years -- the bilge on the 34+ is narrow with keel bolt nuts in the bottom which makes the float switch sit too high IMHO. I can't get all the way to the bottom with the Water Witch but can retain less water than with a float switch. I also have one in the shower sump to control the shower pump.
Monty Scandia 1991 C&C 34+ Annapolis, MD
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