Because diesel fuel doesn't last more than about two years without degrading, I use the fuel tanks on my M35A2 and newly acquired M35A3 deuces, along with two John Deere tractors for fuel storage. I always keep them topped off. My MEP-003A came with the auxillliary hose and bung hole adapter. I simply drive a deuce or tractor near the genset and pull fresh fuel to replenish the tank. The MEP-003A uses about 1 gallon of diesel per hour and I believe the MEP-002A pulls about half of that. Between the genset fuel tank, the deuce tanks, the tractor tanks, and 20 gallons of fuel in cans, I can run for several days without difficulty and I don't have a fuel degrading problem. It is also very easy to keep the deuce and tractor tanks full as opposed to 55 gallon drums. Once per year, I drain the genset tank into a tractor and burn it, replacing with fresh fuel, since I keep the genset and cans full of off-road diesel which can't be burned in the deuces without risking a fine.