Here are some pics of my oil pump. The pump is a 12v unit that would usually be used for a mobile spraying unit. I used a ball valve to the stock drain hose; to keep any pressure or oil from leaking all the way through the pump. The rest are just barbs with hose and clamps. I decided not to put the pump on a switch. I didnt want anyone to just try it out. It works well when the oil is somewhat warm. I ususally try to drain it right after we load.