If there is none, open valve completely. If there is, make sure nut is securely positioned and tightened. Repeat with 'B' valve. Install Mixing Nozzle Align nozzle locking arms with slots in gun body. Push in firmly until you hear a 'click'.
Nozzle is then firmly secured.
Aim gun into waste container. Dispense foam at full pressure to make sure chemical is feeding from both tanks and reacting to make quality foam. To remove nozzle, squeeze locking arms and pull nozzle out. Simply hold the gun as you would a pistol and pull evenly on the trigger until you obtain the desired flow. For Spraying A common rule of thumb is to hold the nozzle about 18 - 24 inches from the area to be foamed.