Installation and Maintenance

All operating and set-up instructions assume nozzles to be new or well maintained. If nozzles are worn out, tips or orifices worn or distorted or deflector surfaces marred, pattern distortions may occur and metering may be off. Timely maintenance and replacement of nozzles, when necessary, is critical to nozzle performance. Replacement of diaphragms and o-rings in check valves should be done annually.

  • Use hand pressure only when installing nozzles and check valves. Do not use wrenches.
  • Use Teflon paste, instead of Teflon tape. Tape has minute strands which can cause drip problems.
  • Mount nozzles so that liquid is released parallel to the air stream in non-turbulent areas on the spray boom.
  • Check tension on each nozzle and check valve cap after installation. Tension should be loose enough on the nozzle to allow changing of orifice or deflector by hand but tight enough to prevent movement once set. Check valve cap should be tight.
  • Use blocked tees on outermost nozzles at each end of boom. Feed these nozzles from end of boom through 3/8th (no smaller than 5/16th) line. This prevents air build-up at the boom tip and ensures proper check valve function.
  • Check nozzles and check valves for tightness each day for several days after initial installation. Components tend to “seat” and only need to be checked once a week after that occurs.
  • Set nozzle to largest orifice and pull stem on check valve to flush debris when dripping or leaking occurs.
  • Be sure aircraft and mix station filters are working properly. Poorly designed or maintained systems can cause leaking problems.
  • Avoid disassembling check valve. If filtration systems are working properly, this should not be necessary.


    • Parts are available for all CP’s nozzles and check valves. Call your CP® aerial distributor to purchase parts.

    Check Valve Patent #5,190,074 Carousel Patent #5,884,847 Swivel Patent Pending