The Quad-X range of weed wipers can be bought with or without the tanks. If you already have a sprayer tank with a high capacity pump, you should be able to use it to run the Quad-X weed wiper. However you will need this wiring kit for the Quad-X Weed Destroyer™ or the Quad-X Xterminator™ if you choose to use your own existing tank. This wiring kit is essential to activiate the manual chemical application system and forms the button you need to push to apply chemical to the weed licker rollers.