Wondering what the ideal combination of gpm and psi is for winter washing of grain trailers. Needs to be able to melt some of the ice and snow and get the sand, grit and salt off.
Too much pressure and flow will make it hard to hold the wand for 2 hours. Have 4 gpm and 3500 psi now and need to replace the washer with a new one. Not sure if 5 gpm and 2000 psi is better or 5 gpm and 3000 psi.
They rate these washers in cleaning units, ie. take psi x gpm and that equals cleaning units. So 4 gpm x 3000 psi =12000 units. With that formula 5gpm at 2000 psi is only 10,000 units, but 2 gpm at 6000 psi would be 12,000 units and there is no way that 2 gpm would wash all the snow away at any pressure.
Opinions on whats the best for snow, ice and slush stuck to the truck and trailer. Majority of the use for this pressure washer will be winter cleaning.