The best system on my opinion is – Pump that does not stay in the water / beneteau comes with such factory installed / pick up hose with strainer at the end in the lowest part of the bilge. Warning light and sound alarm connected to the pump. Pump hot wired to the house battery with switch ON - AUTO / never off / , fuse appropriate size. Wiring / connections / should be done with heat shrinking isolation and anti corrosion grease.
Thru-hull at transom above the water line, hose with loop / you can see it when water starts coming out / specifically designated only for this pump and NO check valves. Float switch should have exposed floating part / you can check system operation every time you are on board by lifting the float with your finger. Keep the area around the float free of items that can collapse on top of float. Keep your bilges clean of debris. Buy BIG bilge pump, the smaller the boat the faster will sink from same size hole at the bottom.
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