Rain Bird Irrigation Controller SST400IN Indoor 4-Station — Easy Programming & Surge Protection

The Rain Bird SST400IN is a user-friendly indoor 4-station irrigation controller that lets you program independent schedules, seasonal adjustments, and rain delays to conserve water and keep landscapes healthy.

Designed for installation inside a home, garage, or waterproof shed, the SST400IN replaces the older SST400I with improved programming and built-in surge protection. It controls up to four 24 VAC valves and offers zone-by-zone settings, four start times per day, and easy-to-read LCD and LED indicators so homeowners and property managers can set accurate watering intervals without fuss.

How easy is it to program each zone?

Programming is intentionally simple: turn the dial to a zone, enter watering minutes, then select custom day patterns. The interface is built for quick setup with clear feedback from the LCD and LED lights so you can confirm settings at a glance.

• Individual zone run times from 0 to 240 minutes
• Set custom weekdays, odd/even days, or cycle every N days per zone
• Up to four start times per day for each zone
• LCD and LED indicators for instant status checks

What water-saving features does the SST400IN offer?

The SST400IN gives practical controls to reduce water waste without complicated sensors. Seasonal Adjust and Rain Delay let you temporarily scale back watering during wet seasons or pause schedules after storms, and multiple start times support short cycles to improve infiltration and limit runoff.

• Seasonal Adjust from -90% to +100% to tune runtimes
• Rain Delay suspendible for up to 72 hours
• Multiple short start times per day to prevent runoff on slopes or clay soils
• Compatible with external rain sensors and master valve or pump start relays

Is the controller reliable and safe during power events?

Yes — the SST400IN includes robust protections and retains all settings through outages. Built-in surge protection guards electronics from spikes, while non-volatile memory preserves your programming so you won't need to reconfigure after a power interruption.

• Superior built-in surge protection against lightning and power surges
• All settings stored indefinitely in non-volatile memory
• Automatic fault detection that pauses a zone and displays the affected valve if a short is found
• UL and cUL electrical certifications for safe indoor installation

What installation and compatibility should I expect?

The SST400IN ships with a transformer and a six-foot power cord and is engineered for indoor mounting. It works with most 24 VAC irrigation valves and supports a master valve or pump start relay, making it suitable for typical residential drip and sprinkler setups.

• Includes transformer power plug with 6' cord and installation guide
• Output: 25.5 VAC / 0.65 A; Input: 120 VAC / 0.17 A
• Supports master valve/pump start relay and external rain sensor
• Sealed case to protect from moisture, insects, and grime in indoor locations

Who is this for? Homeowners, landlords, and small-property managers who want a straightforward, dependable indoor timer for up to four irrigation zones will find the SST400IN a practical choice. It’s ideal for users who prefer hands-on zone control, need multiple start times for soil and slope management, and value surge protection and memory retention so programming survives power loss.