Also I have dual batteries. If there is very heavy rain and Ive not been to the boat in a week or so I must manually run the pump for 4-5 minutes to clear. Otherwise the arrangement wont work as it should be.
The typical bilge pump system has one float switch and looks like this the Pump and Float Switch diagram.
This way even if your battery switch is off if your boat starts filling with water the pump will still kick on. Perko Dual Battery Switch Wiring Diagram Car Wiring Diagram. Bilge pump battery switch and fuses and most importantly the fuel tank are placed. Buy Here Bilge Pump Float Switch Wiring Diagram.