The Hardie RD-600 controller, installed in many systems in the late 1990s, is no longer manufactured under the Hardie name. However, a direct replacement is readily available.
Hardie was acquired by Irritrol, which continues to produce the same controller under the Rain-Dial name. The "600" denotes a 6-station model; Rain-Dial controllers are also available in 9- and 12-station versions.
Check local irrigation supply stores such as Ewing Irrigation, Horizon Distributors, or Sprinkler World (in Arizona). These retailers typically stock the Rain-Dial series.
If only the faceplate (panel) has failed, you can often replace just the panel instead of the entire controller housing and circuit board, saving time and money.
Before purchasing, confirm the number of stations your system uses. If unsure, count the active zone wires at the controller terminals.
With the Rain-Dial, you get a reliable, modern controller that wires identically to the original Hardie RD-600, making the swap straightforward for most homeowners.
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