Spray Tip Calculator « Go Back Instructions: Enter the info red boxes. After you click update, the required amounts will be calculated. Choose your application rate units between Gal/acre or Gal/1000sq. ft. Consult the ISO nozzle color codes below to see the corresponding pressure. Tip spacing, in* Update Speed, MPH* Update Application Rate Application Rate, GPA Application Rate, Gal/1000sq.ft. Update Flow Per Tip, GPM Solution Density (Water = 8.34 lb/gal)* Update ISO Color Pressure 01 psi 015 psi 02 psi 025 psi 03 psi 04 psi 05 psi 06 psi 08 psi 10 psi 15 psi 20 psi 30 psi 40 psi 50 psi 60 psi OR use the Mobile App: Spray It by Pentair