5.2 Water Spray Nozzle Replacement (Cont.)
4. Vent the pressurized air from the delivery unit using the vessel valve located
on the top of the pressure vessel unit. Turn valve slowly (earplugs
recommended) releasing air pressure.
5. Lay nozzle handle on work surface. Use a 1/2” wrench and a 7/16” wrench to
loosen the water spray nozzle tip. Note the position and alignment of the tip.
This is important to ensure the correct water spray pattern.
6. Replace water spray nozzle tip using small amount of pipe dope. Make sure
not to get pipe dope into the I.D. of the nozzle tip. Tighten nozzle into fitting
and nozzle disc. Align nozzle to make a triangular cone pattern.