Sample of general system pressure requirements for common harvest and use applications.
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End use Pressure (head-feet) Pressure (pounds per square inch)1 Reference
Irrigation
Drip system, lower range 35 15 ARCSA, Table 13.2
Drip system, higher range 58 25 ARCSA, Table 13.2
Garden hoze nozzle 81 35> ARCSA, Table 13.2
Pressure washer 1300-3300 Greenworks
Toilets 34-46 20-80 (max) Kohler
Dishwashers 46-51 20-120 GE Appliances
1 Pressure(psi) = 0.433(HD-ft)(SD), where SD = the specific gravity of the fluid being pumped. For water at ambient temperature SG  1.0).