Fittings and clamps A frequent source of leaks is loose or cracked fittings. Fittings and clamps need to be snug prior to putting the system under pressure and pumping liquid. Once the system is under pressure, check for leaks. These should be checked to make sure they are not plugged. The spray tip should be replaced when wear causes flow to exceed that of a new tip by 10 percent.
Worn nozzles mean more chemical sprayed and often an irregular spray pattern.
Nozzle openings may change especially when abrasive formulations, i.e. wettable powders, are used frequently. Cleaning Spray Equipment Cleaning pesticide spray equipment involves flushing out the spray system with clean water. It is nearly impossible to remove all traces of pesticides from spray equipment. However, careful cleaning and flushing will remove all but insignificant amounts. Equipment should be cleaned at the end of each day of use unless the same pesticide will be used over a several-day period.