Rachio 3 (8-zone)
WaterSense labeled smart controller. Specs
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Rachio 3 vs Hunter Hydrawise HPC
Both are Wi-Fi controllers that adjust watering to the weather. Rachio 3 is a fixed-size controller; the Hunter HPC is modular, from 4 to 32 stations.
| Rachio 3 | Hunter Hydrawise HPC | |
|---|---|---|
| Weather adjustment | Rain Skip and Seasonal Shift (Rachio) | Predictive Watering from local weather data (Hydrawise) |
| Stations | 8-zone model linked here | 4 to 32, modular (Hunter) |
| Monthly fees | No monthly fees; some features are Premium (Rachio) | See plan details at Hydrawise |
| Install | 30 minutes or less, no special tools (Rachio) | Plastic wall-mount cabinet, 120 VAC plug (Hunter) |
| WaterSense | Check EPA list | Listed as EPA WaterSense approved (Hunter) |
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Which fits your yard?
- Need room to grow? The HPC adds stations with plug-in modules, 4 to 32 (Hunter). The Rachio 3 linked here is the 8-zone model (Rachio).
- Already have a Hunter Pro-C? Hunter sells an HPC front panel (HPC-FP) that upgrades a Pro-C to Wi-Fi Hydrawise control (Hunter).
- Adding sensors later? Hydrawise works with Hunter’s Rain-Clik, Soil-Clik and HC flow meter (Hydrawise).
- Want a rebate? Most programs require a WaterSense labeled controller. Check the model on EPA’s list before you buy (EPA WaterSense).
Rachio vs ARC8 vs B-hyve → Install steps → Replace a controller →
Parts you may need
Hunter Hydrawise HPC-400
4-station base, modular; Hydrawise Wi-Fi. Specs
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When to call a pro
Modules, pumps, master valves or line-voltage wiring? The EPA suggests hiring an irrigation professional certified by a WaterSense labeled program (EPA WaterSense).
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A few emails a year: spring startup, fall shutdown, new smart controllers, and a heads-up when your utility opens or changes a rebate.
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Steps summarized from the linked manufacturer and EPA pages (checked 2026-10-18). If your valve or head brand differs, follow its manual.