Pump and Spray Performance

Thursday July 19, 2012


Mr Pest Control


How can I measure output pressure (p.s.i.) at the nozzle of my JD-9 gun or lawn wand on my truck mounted spray rig? Not just the pressure the device is rated for. I am trying to evaluate major changes to the output p.s.i. of my spray rig and their ultimate effect... this may be plumbing changes, orifice configurations, aging components, and other variables that all have effects on the ultimate pressure of the insecticide applied. I am a pest control technician who utilizes this rig at least 5 days per week for perimeter spraying, lawns & outdoor commercial.

Richard, TX

Mr Pest Control


The ideal and most accurate way to measure pressure at the nozzle would be to have a pressure gauge installed on the spray gun, and JD-9 gunjets do come as one model tooled to accept a pressure gauge. If yours is not set up to screw a gauge directly onto the gunjet the next best thing would be to install a gauge in-line between the hose and the gunjet, and these are available as well. The gauge will probably feel like it is getting in the... Read more

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Please note, Mr. Pest Control is answering questions supplied by PMP customers across North America. His answers are generated from industry and manufacturer-provided information. The answer may not be specific to the laws and regulations for your State, Province, Territory or Country. In addition, products mentioned may not be registered and or available in all areas. Always check with your local Univar office for specific information to your area. Always read and follow label directions.

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