Solar Spray Pro — Zone Sizer

Max manifolds per zone using manufacturer nozzle curves. Elevation reduces available pressure; smaller/longer feeds increase friction.

Vertical rise from zone valve to highest nozzle. ≈ 0.433 psi/ft.
Straight run from tap/zone valve to farthest manifold. Adds +50 ft upstream & +5 ft per manifold automatically.
Regulator/backflow/PRV capacity at the site.
Flow per nozzle
Flow per manifold
Max manifolds/zone
Total flow at max
Velocity limit (~5 ft/s) for selected feed ≈ gpm.
Suggestions
    Elevation loss
    Allowable friction
    Feed velocity check

    Assumptions: Hazen–Williams C=150 (PVC), 130 (Copper). Elevation 0.433 psi/ft. Nozzle flows at 4 bar scaled by √(P/4). Minor losses: +50 ft upstream, +5 ft/manifold.