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Slope Irrigation Design: 35×20 ft, 45° Slope – Rotors vs. MP Rotators

Owner plans to replace a leaking anti‑siphon valve and asks about sprinkler choices for a shaded 45° slope with drought‑tolerant plants.

Recommendation

Use Rain Bird 1812 12‑inch pop‑up spray bodies with Hunter MP Rotator nozzles. MP Rotators apply water slowly (low precipitation rate), preventing runoff on slopes. The 12‑inch pop‑up clears ground cover.

Follow‑Up: Can All Heads Be at Bottom of Slope?

No. Heads must overlap for coverage. Place heads at each corner (top and bottom) and use swing‑joint assemblies for adjustable angles. Keep heads level with the horizon, not the slope; bottom heads may need a slight backward tilt.

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