The 2-Way W-25HC Spray-All is a "high concentrate" spray applicator that will achieve strong dilution ratios for applying up to two chemicals for the toughest cleaning jobs. This venturi injection system uses standard city water pressure (35 - 125 PSI) to draw and blend chemical concentrates into the water stream to create very strong chemical solutions. The diluted solution is then projected through the discharge hose and fan nozzle as a uniform spray on to a variety of surfaces. Use the chemical ball valves to inject the 2 chemicals separately or simultaneously. Weaker dilution ratios are achieved with metering tips. With a flow rate of just over 1 gallon per minute, this unit is great for spraying virtually any sized area or object quickly and completely.