Actually, there are so many different variables should be considered before you purchasing a spray gun for your project.

No matter which one you select, two points always should be concerned at the first place.

The one is that pressure of the spray gun can work with your pressure washer. (Pressure can be divided into 3000psi,4000psi and 5000psi….)

Another point is that the inlet adapter of spray gun can connect with other tools, like hose, extension wand…

(Most popular inlet adapter is M22-14mm,3/8 quick plug,G3/8 female and so on…)

Things also can be concerned when you selecting the right spray gun

1.Types of material

2.Can be connect with foam cannon

3.Can be connect with nozzle

4.The weight of the spray gun