VEVOR Pressure Washer Surface Cleaner, 21\'\', Max. 4000 PSI Pressure by 3 Nozzles for Cleaning Driveways, Sidewalks, Stainless Steel Frame with Rotating Dual Handle, Wheels, Fit for 3/8\'\' Quick Con

75 MM orifice with a 65 degree spray angle. Reduce the orifice size if you re not satisfied with the performance. Of course, you will have to clean at a slower speed. I found it does a really great job when the next pass overlaps 1/2 of the 21” path you had just completed. So far, a satisfied customer Regards, Brian Hope this helps NOTE: - I find it quite unusual Vevor does not stock parts for mine. - The first reply states 2000PSI min. Man. 800PSI

This comes down to the pump flow / pressure and the jet orifice size. The pressure is easy because the manufacturer states 800 psi is the minimum requirement for this 21” surface cleaner. Regarding flow: if you find you are not obtaining the effects you desire then change the jets to smaller orifice. My 21” surface cleaner. The manual states “025 nozzles”. What does this mean. After communicating with Vevor Ella(July 5, 2023)she stated the jets are ¼” NPT(maybe same as 025??)

The pressure of the high-pressure cleaning machine can meet the working requirements of the pneumatic floor washing machine if it reaches above 2000psi.