The Millennium SPW System is an accessory that makes the difficult task of watering industrial batteries elementary. It consists of automatic shut off valves interconnected with tubing that replace the existing vent caps. A quick coupling allows the end of the tubing to be connected to a water supply. Once connected, water flows into each cell until it reaches the appropriate level. A flow indicator tells the operator when filling has been completed. The entire process takes just 30 seconds or less per battery.