Thorough Clean says, A turbo nozzle efficiently increases the cleaning pressure (PSI) by about 60% by changing the fan nozzle. It can increase the pressure from 2200 to 3520 PSI. Rather than a fan jet stream, the water is condensed down into a pencil jet stream. This is how the work is done. According to the University of Georgia Extension, A 110-degree fan angle can be used on this nozzle.