I want to buy a tree spraying rig for my property but would like to know its theoretical capabilities first. The rig has a gas powered diaphragm pump capable of delivering 20 GPM @ a maximum pressure of 300 psi. The hose coming from the pump is 150' long and is 0.75in diameter. It has a solid stream nozzle that measures 0.1875in diameter. What would the maximum theoretical elevation that this setup could deliver a steady stream of water? The nozzle would be aimed at between 45 and 60 degrees from horizontal.
well water exerts about 1 atm pressure (15psi) for each 33 feet of depth so 300psi is about 10 atm meaning that your pump could support a column some 330ft high then figure what pressure you would need to make your spray effective and subtract 33ft per 15psi this is only a ballpark estimate losses in hoses will be significant
