The J-Fill QuattroSelect Safe Gap Dispensing System is a wall-mounted dispenser that accurately dispenses four chemical solutions (not included) into bottles， buckets or floor-care machines. The J-Fill platform is safe， reliable， accurate and sustainable. Smartvalve technology automatically chooses correct flow rate in one operation. SafeGap and Air Gap eductors meets ASSE 1055B standard for backflow prevention. J-Fill uses super-concentrated and hyper-concentrated chemicals and reduces "in-use" cost and solid waste disposal. Spill-Tite cartridges are leakproof and virtually eliminate chemical exposure， tampering and manually diluting products. Rugged steel doors lock and feature built-in product identification windows. System comes with keys and includes drip tray with drain hose， a remote high-flow bucket/autoscrubber fill gun， one-handed 1.5 GPM low-flow and low-foam bottle fill and 8' 3.1 GPM high-flow bucket fill hose with easy-to-use， point-of-use activation.