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Irritrol RD900-EXT 9-station RainDial outdoor irrigation controller with weatherproof enclosure, control dial, and terminal connections visible

Irritrol RD900-EXT 9-Station RainDial Outdoor Controller

Brand: Irritrol
Save 27%
$548.85
$397.92
SKU RD900-EXT
In Stock (1)

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The Irritrol RD900-EXT RainDial is a weather-adaptive outdoor irrigation controller that manages up to nine stations. Designed for straightforward installation and reliable day-to-day operation, it combines the proven RainDial scheduling system with optional weather-based Climate Logic control to reduce overwatering and conserve water across residential and light commercial landscapes.

  • 9 independent station outputs provide precise zone-by-zone watering and support flexible system layouts and expansion.
  • Climate Logic® compatible — when paired with the Climate Logic wireless weather sensing system the controller automatically adjusts run times based on local temperature and conditions.
  • Rain-sensor ready with a dedicated terminal and sensor bypass switch to prevent irrigation during wet conditions and save water.
  • No external transformer required; built-in power management streamlines wiring and simplifies installation.
  • Supports three programs with configurable overlap control so up to three programs or stations can run simultaneously, or you can restrict operations to avoid overlapping station runs.
  • Compatible with the CRR remote series and features user-friendly controls for quick program edits and selective program erasure without affecting other schedules.

Downloadable product documents (Sell Sheet, User Guide, Quick Reference) are available on the product page. The RD900-EXT is an efficient, dependable choice for homeowners, irrigation contractors, and property managers who need straightforward, water-smart control for small to medium landscaping projects.

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Frequently Asked Questions

What power source does this controller use?
The RD900-EXT uses standard AC power and does not require an external transformer; follow the user guide for proper wiring.
How does Climate Logic work with this controller?
When paired with the Climate Logic wireless weather system the controller automatically adjusts watering run times based on local weather to reduce overwatering.
Is the controller compatible with rain sensors or remotes?
Yes — it is rain-sensor ready with a dedicated terminal and sensor bypass switch, and it is compatible with the CRR remote series.
Can programs run at the same time or be staggered?
The controller supports three programs and configurable overlap control so you can allow simultaneous runs or restrict overlapping station operations.

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