Can the power washer be stored outside in freezing temperatures?

Yes, if it has been treated with a Pump Saver. A special designed anti-freeze and lubricant formula that helps to prevent harmful buildup of hard water mineral deposits. It protects pistons, valves and seals from damage during storage.  The Pump Saver bottle has a molded cap that allows direct connection to the water inlet.

There is water in the pump that cannot be completed drained out of the unit. It’s recommended for any extended storage.  The Pump Saver conditions and protects the valves and seals inside the pump in any climate. (Part #PW64511)