Drip Zone Flow and Valve Capacity
The total emitter flow on a drip zone (gph and gpm) and its utilization against the valve / lateral flow limit.
Example
You enter
- Input mode inline
- Dripline length (ft, inline) 300
- Emitter spacing (in, inline) 18
- Rated flow per emitter (gph) 0.9
- Valve / lateral limit (gpm) 12
You get
- Emitters 200
- Zone (GPH) 180
- Zone (GPM) 3
- Valve utilization 25.0% - within limit
Details, formula, and sources
With the emitter count given directly (point-source) or derived from dripline length and emitter spacing (inline). Keep utilization under 100% or the far emitters starve; a flow-budget check, not a hydraulic pressure-loss model.
inline emitters = floor(tubing_ft x 12 / spacing_in); zone_gph = emitters x emitter_gph; zone_gpm = zone_gph / 60; utilization = zone_gpm / valve_gpm x 100.
First-principles total-flow and utilization relations with the Irrigation Association low-volume references and the major-manufacturer drip design data (by name); no edition cycle.
The total-flow and utilization relations are public low-volume irrigation practice. The per-emitter flow and the valve / lateral limits are in the manufacturer's drip design data.
Estimate. AHJ and licensed professional govern.
Field names used by the API: mode, tubing_ft, spacing_in, emitter_gph, valve_gpm, emitters, zone_gph, zone_gpm, utilization
- Total flow zone flow = emitters x rated gph, converted to gpm (/60)Irrigation Association low-volume references
- Emitter count inline mode derives the count from dripline length and emitter spacing; point-source mode takes it directlymanufacturer drip design data
- Valve capacity keep utilization under 100% of the valve / lateral limit or the far emitters starvemanufacturer drip design data