When attempting to determine the correct orifice size use a nozzle selection chart with your machine specification of GPM and PSI. You can also look at the side of the nozzles provided with your pressure washer for a number sequence. On MTM QC nozzles, for example, you will see 25030 which translates to “”25° spray pattern with a 3.0 orifice.”” If you were to see this sequence, you would select the 1.1mm nozzle (3.0 orifice) for your foam cannon as it is a closer match to the required specs of your pressure washer.








