310 m² garden — mains water
A complete irrigation design for a typical plot: sprinkler layout, zoning against a 20 l/min mains supply, bill of materials and material cost.
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At a glance
- Watered area
- 305 m²
- Sprinklers
- 21
- Zones
- 4
- Coverage
- 95.9%
- Uniformity (CU)
- 58.6%
- Water supply
- 3.2 bar · 20 l/min
- Pipe
- 180 m
- Overspray outside lawn
- 3.3 m²
- Material cost
- 3,202 zł
- Estimated labour
- 34.3 h
The rule this demonstrates
Head-to-head spacing (R1): every sprinkler's throw must reach the next sprinkler, not the edge of its spray. A sprinkler applies the least water at the end of its throw, so its neighbour has to make up the difference.
What this design does not show
Uniformity (CU) of 61.6% is an honest number, not a boast. CU says how evenly the water lands: 100% is unreachable in practice and domestic systems typically sit between 55% and 75%. We publish it because a wholesaler's quote will not show it at all.
Zones and hydraulics
| Zone | Heads | Flow | Pipe | Velocity | Pressure at head |
|---|---|---|---|---|---|
| Valve 1 | 2 | 3.4 l/min | Ø20 | 0.2 m/s | 3.2 bar |
| Valve 2 | 11 | 18 l/min | Ø20 | 1 m/s | 2.9 bar |
| Valve 3 | 5 | 18 l/min | Ø20 | 1 m/s | 2.9 bar |
| Valve 4 | 3 | 8.4 l/min | Ø20 | 0.5 m/s | 3.1 bar |
Bill of materials
| Item | Qty |
|---|---|
| Hunter MP Rotator MP-LCS-515 (0°) | 2 szt |
| Hunter MP Rotator MP1000 (180°) | 5 szt |
| Hunter MP Rotator MP1000 (90°) | 7 szt |
| Hunter MP Rotator MP3000 (90°) | 4 szt |
| Hunter MP Rotator MP2000 (90°) | 1 szt |
| Hunter MP Rotator MP3000 (180°) | 2 szt |
| Hunter Pro-Spray 04" | 21 szt |
| Swing pipe connection Ø16 mm | 21 szt |
| PE pipe 20 mm | 180.2 m |
| Solenoid valve (per zone) | 4 szt |
| Valve box (manifold, up to 4 valves) | 1 szt |
Material prices are indicative (engine price list) and exclude labour.
How this design was made
The site geometry (lawn, house, paths, beds, tap) was drawn the way a user would draw it. Everything else — sprinkler placement, nozzles, arcs, zoning, pipe routes, hydraulics and the bill of materials — was computed by the IrriForge engine from the Hunter and Rain Bird design manuals. The numbers on this page are generated by a script in the repository, so a change in the engine or the catalogue changes them immediately.
Variant “Hunter MP Rotator + Hunter MP Rotator (MP2000–3500) · economy (fewest heads) · distributed” of 3 offered by auto-design.