WaterWar.net

Hello.
Does anyone know where this black O-ring shoud be set?
I have been trying to fix my CPS 2500 and found this o-ring is left and have no idea. Please let me know.
Thank you very much.

That O ring goes in a groove around the main nozzle that contacts the back of the nozzle selector. Also where is your firing valve plunger head seal?