The pump I have fitted to my RIb that spends its time on Mooring is:
or older model, I get about two/three years from it.
I have started my boat after 2/3 weeks on mooring this, and look at the rain we had this year. So civilised to find boat dry! A tender in the Harbour had over 9 inches of water in it, when i emptied it for the owner.
This pump has 3 wires and easy to rig with auto switch.
Been using same type for last 8 years, i used with mecury switches before but these failed one after 1 month!