Pump GuardNovember 14, 2007 L. Jones Since I own a Karcher 3,000 PSI Pressure Washer, I wanted to buy thier "Pump Guard" to keep in good working order. Pretty simple to use. Also a non-pressured bottle so you will have to connect, pull the started handle a few times to get the stuff inside the pump ( I have a Gas Powered) and your done. I also have used Dewalt's pump guard cans and seems simpler to use. Connect and press a button until foarm comes out of the pump.