120 m² front lawn — the narrow strip
A small lawn with a walkway and narrow strips along the wall — the case where it is easiest to water the facade instead of the grass. Including what the engine does not do perfectly.
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At a glance
- Watered area
- 120 m²
- Sprinklers
- 19
- Zones
- 7
- Coverage
- 99.6%
- Uniformity (CU)
- 70.4%
- Water supply
- 3.2 bar · 20 l/min
- Pipe
- 176 m
- Overspray outside lawn
- 3.8 m²
- Material cost
- 3,770 zł
- Estimated labour
- 38.1 h
The rule this demonstrates
A strip narrower than about 2 m is side-strip-nozzle or drip territory (R6), not a reason to soak the wall. Below about 1.2 m only drip is left.
What this design does not show
This is a deliberately hard case. In narrow corridors the engine can still wet part of a wall — we publish the overspray figure instead of hiding it.
Zones and hydraulics
| Zone | Heads | Flow | Pipe | Velocity | Pressure at head |
|---|---|---|---|---|---|
| Valve 1 | 8 | 17 l/min | Ø20 | 0.9 m/s | 2.8 bar |
| Valve 2 | 2 | 3.3 l/min | Ø20 | 0.2 m/s | 3.2 bar |
| Valve 3 | 1 | 3.7 l/min | Ø20 | 0.2 m/s | 3.2 bar |
| Valve 4 | 2 | 4.1 l/min | Ø20 | 0.2 m/s | 3.2 bar |
| Valve 5 | 1 | 5.9 l/min | Ø20 | 0.3 m/s | 3.2 bar |
| Valve 6 | 3 | 4.1 l/min | Ø20 | 0.2 m/s | 3.2 bar |
| Valve 7 | 2 | 1.5 l/min | Ø20 | 0.1 m/s | 3.2 bar |
Bill of materials
| Item | Qty |
|---|---|
| Hunter MP Rotator MP3000 (90°) | 3 szt |
| Rain Bird R-VAN RVAN18 (180°) | 1 szt |
| Hunter Pro-Spray 8H (180°) | 2 szt |
| Hunter MP Rotator MP2000 (90°) | 3 szt |
| Hunter MP Rotator MP1000 (180°) | 3 szt |
| Rain Bird 1800 Series 8-VAN (270°) | 1 szt |
| Hunter MP Rotator MP1000 (90°) | 1 szt |
| Hunter Pro-Spray PRO-4A (270°) | 1 szt |
| Hunter Pro-Spray 2H (180°) | 2 szt |
| Hunter Pro-Spray PRO-4A (90°) | 2 szt |
| Hunter Pro-Spray 04" PRS40 | 10 szt |
| Rain Bird 1800-04" | 1 szt |
| Hunter Pro-Spray 04" PRS30 | 7 szt |
| Rain Bird 1800-04" SAM-PRS | 1 szt |
| Swing pipe connection Ø16 mm | 19 szt |
| PE pipe 20 mm | 175.5 m |
| Solenoid valve (per zone) | 7 szt |
| Valve box (manifold, up to 4 valves) | 2 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 “V4 · Clean layout · declared gaps” of 3 offered by auto-design.