|Industrial pressure washer pump|
|This is what most professionals will use|
|Medium sized residential power washer|
|Small pump use on electric units as well as smaller gas motors|
Why so big? because we can make those plungers bigger and inturn you will run more water thru the pump with each stroke of the plunger the bigger area will force more water thru. When I started in the business 5 gallons per minute was just about the best you could do why would you need more? The size of the plungers is the best way we can add more gallons per minute and with larger amounts of water will change our CU an example of this is 3000 psi pump putting out 5 gpm 3000x5=15000 cleaning units 3000 psi pump putting out 10 gpm 3000x10=30000 cleaning units and so on 8 and 10 gpm pumps are getting more popular to day now this type of power in the hands of a untrained person can cause real damage remember the highest powered washer is not always the best. Why use such a thing then you can run two wands or guns off of one unit two people using the same pump will each have 3000 psi and can use 5 gpm at the same time saving water and getting the job done quicker. The use of a surface washer also requires larger volumes of water I will talk about these when we discuss attachments later. Simply put gpm is how much water a pressure washer can put out.