Operation28low pressure adhere better to the surface being cleaned, allowing the formula time to reactand remove dirt more effectively.Note: An external chemical injector pump is not recommended for use with this pressure washer.WARNING: Chemical spraying Never spray acids, corrosives, or abrasive or flammable liquids. Breathing hazards, surfaceburns/corrosion, or fire/explosion could result. Follow the chemical manufacturer's label instructions for proper use and handling of thechemical. Understand all safety hazards and first aid for all chemicals being used. Alwayswear protective gloves when handling and cleaning with chemicals, and wear otherprotective gear as directed by chemical manufacturer. Always dispose of hazardous fluidsper local, state, and national guidelines.Acquire cleaning chemical Use only NorthStar pressure washer chemicals or chemicalsspecifically formulated for use with pressure washers.CAUTION: Non-approved chemicals can damage pressure washercomponents (seals, wand, hoses, pump, etc.) and be harmful tothe environment.Prepare for chemicalspray (if planning to use)Prepare the pressure washer for chemical spraying using thefollowing steps:1. Prepare (dilute) the chemical cleaning solution as required forthe job.(Note: The chemical injector is adjustable and will mix thechemical solution into the spray up to a maximum ratio of 1 partchemical solution to 13 parts water.)2. Disconnect the high pressure hose from the water outlet.3. Snap the quick couple chemical injector onto the water outlet,then snap the high pressure hose onto the chemical injector. SeeFigure 10.Figure 10StrainerChemical InjectorHigh Pressure HoseHigh PressureOutputDilutedChemicalAdjustment Knob