Here we go, Bennington bilge pumps:
ESP tubes with center storage have a "mid-ship" bilge pump. I/O models include a second bilge pump in the engine compartment. The I/O bilge pump is auto and always on, even if the battery switch is off.
The Mid-ship bilge operates via a switch or switches, depending on the model. R & Q models use two switches: Master Power and Auto/Manual Bilge switch. G & S models require only the Auto/Manual Bilge switch. Any of these switches, if left on for a longer period of time, will drain the battery! We suggest turning all switches off when leaving the boat for the evening.
MANUAL: runs as long as you have the switch on, whether there is water in the tube or not.
AUTO: runs only if enough water hits the float to operate.
Water in the storage compartment can come from the lid, condensation, or minimally from the collar between the deck and tube. When you cover your boat, we suggest that you leave the center storage lid OPEN!
You and your dealer can by-pass our system and run your own hot wire, but we do not believe this is necessary.
Hope this helps! TB