My brother in law and I both have 105 gallon fuel tanks with 12 volt electric 15 gpm pumps with 10 micron filters. Mine has an auto-shutoff nozzle on it which keeps me from running the tans over. The pumps wont actually pump 15 gallons per minute thru a filter, more like 5 due to the restriction but it fills my tractor tanks pretty fast. I just bought a regular truck battery, set it on top of my fuel tank, hooked up a battery minder to it so it stays charged. I keep my tank inside with my enclosed shed with the boat and lawnmowers so it limits the heating and cooling cycles of damp night air. Had it 4 years and never had any issue with water. Brother in law, keeps his under an open shed but still no problem with water contamination.
Recently my fuel distributor said that he was upping the minimum purchase to 250 gallons, so my brother in law brought me a 275 gallon TOTE Tank ( the plastic with steel frame around it type that all kinds of chemicals are delivered in. This one had some kind of epoxy hardener that I first flushed with water then flushed with some gasoline. The gasoline cut out the residue that was left. So the guy comes to fill our tanks and we take about 200 gallons. BIL asks if he is going to charge the $50 surcharge for less than 250 and he says no, so we didn't put any fuel in the tote tank. I still have it next to my other tank and ready for diesel if I have to use it.
It was free for the going and get it from a chemical plant in Arkadelphia. I can get as many as I want. They used to wash them out clean but now they just sell them as is when they drain out most of the stuff. I see folks selling them (or at least trying to) for $150 on Craigslist. I am sure they are for free at lots of places that use the tote tanks as they are no refund on them and one time use.
