PSI is the Pounds Per Square Inch measurement of water pressure. The greater the PSI, the better the cleaning efficiency of the power washer. It is also measured as gallons per minute water flow. It is the PSI of the power washer which determines its power to clean a surface. The greater the PSI the greater is the power of the washer to fight stains and clean derbies. Therefore while making the buying decision, the PSI of the unit plays a crucial role.

There is nothing as the best PSI for a power washer. Indeed it depends greatly on the task in hand. If your task involves cleaning mild stains from a delicate surface, the more PSI unit will not only clean the stains but in real sense will act as possible threat for the surface that needs to be cleaned. The more PSI means it can actually damage the surface with the water pressure and on the other hand will also increase the cost of the unit that comes with more PSI. Similarly choosing for less PSI means the task of cleaning the stains or clearing the derbies will not be fulfilled and the unit will be a waste. Therefore it is quite necessary to do a small research on the PSI and its significance with the task in your hand.