
We have the STS-6000-4GPM installed on a 4,000 gallon tank. There is a 500 gallon day tank that is, at the moment, unprotected. Both tanks will be treated with AFT-705 (actually put in the day tank) and then the fuel will be periodically transferred back to the bulk tank. Treated fuel will then be loaded into the day tank once a month or quarter…
The STS is actually mounted below the fuel level. The suction line, with a ball valve on the bottom, is about 1/2” off the bottom of the tank. Fuel is drawn UP to the ceiling of the room (about 4 feet from the top of the tank) and then drops about 10 feet to the STS system. The vacuum created by the fall of the fuel and the ball valve in the bottom of the pick-up tube, create an almost zero vacuum situation for the pump. The fuel is almost pushed to it!!
The generator is in a separate room from the tank. The yellow pipes you see running through the wall are the supply and return lines. A very clean, almost pretty (in an industrial diesel fuel sense) install.