Please see the below winterizing directionsWinterizing Water Pump 1. Make sure Antifreeze tank is full. (DO NOT DILUTE)2. Turn Fluid Selector Valve to ANTIFREEZE position.3. Start engine, then turn Water pump switch on. Allow antifreeze to flow from end of the high pressure water wand. If water tanks are empty use the by-pass switch located behind the control panel (LP units only).4. Turn off water pump, shut down engine and return Fluid Selector to WATER position. (Recapture antifreeze by placing end of high pressure hose in top of Antifreeze tank before putting unit back in service)0.5. Drain water tanks.Winterizing/storage of Baghouse Filtration and Vacuum Pump1. Remove top/lid of Baghouse, run one ounce of light weight oil through vacuum pump at 4″ opening at engine idle. Then shut engine down, return top/lid and make sure rubber washer/gasket is under wing nut.DO NOT allow anything else to enter 4″ opening. If your unit has one baghouse filter, please remove filter and add 1 ounce of oil to the suction hole while engine is at idle, then shut engine down and replace filter for storage.For storage of unit for periods of non-useFollow the instructions of winterizing water pump, baghouse filtration and vacuum pump; plus drain water tank dry and chlorinate for algae. Crack open rear door.The above section is printed in the owner’s manual and also on the control panel door. Download the PDF.