Originally Posted by BruceB
I just fitted one of the auto Rule pumps. You can have a manual override but I just wired in into a switch that I leave on all the time. There is no float switch but they start every 2.5 mins and if water is sensed they keep running until the boat is empty then switch off. If no water is present they only run a second or two.
The sensing is based on water resistance so no moving parts.
I just switch it on and leave it on and it seems to work quite well on a RIB bouncing around.
I think I had one of these a couple of boats ago and THB it killed my batteries, so I had to piggy up a second battery if I was away from the boat for a couple of weeks or so as it was berthed at the time.
I came to the conclusion that a pump emptying out 4 gallons or so when it came on, and the water collected was better than one that came on every few minutes when there wasnt even any water there.
It was one of those infuriating boats that I couldnt keep the water out of the underdeck no matter how hard I tried , and I didnt want the cabling getting wet so I installed another auto bilge inside the underdeck. After a trip out, bouncing about, the casing of which came apart unbeknowns to me, water got in, operated the float switch, but as the lower case forms part of the pump journal, it spun away doing nothing flattened both batteries and the boat got flooded, good and proper