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Weathermatic SL1600 Wifi



  • 4 independent programs – each stacks or can operate simultaneously
  • 8 start times per program
  • Indoor/outdoor rated
  • Zone run times settable from 1 min. to 9 hrs. 55 min.
  • Rain/freeze sensing on/off button with tri-color LED indicator
  • Rain delay of 1 – 7 days
  • SLW5/SLW1 Weather Station rain delay programmable from 0 – 99 hours
  • Seasonal % adjust by program, by month
  • Omit time of day window, day(s) of week, and up to 7 calendar dates
  • Programmable zone-to-zone delay 1 min. – 3 hrs.
  • Watering days: custom days of the week, odd/even, or interval days
  • Run/Soak cycles by program
  • Large backlit LCD display
  • Non-volatile memory – with no battery required
  • Internal transformer with pre-installed 6’ line cord (SL1600, SL1620 only)
  • 2 simultaneous watering modes: basic mode and smart mode. Each zone can run in either mode independent of other zones, even in the same program.
  • Basic mode: user controlled conventional operation
  • Smart mode: daily automatic programming adjustments
  • 5 user-selectable languages
  • Simultaneous solenoid operation: 3 solenoids (SL800/SL1600), 5 solenoids (SL4800)


  • ZIP Code input or latitude input
  • Sprinkler type input
  • Plant type input
  • Soil type input
  • More/less ET tuning
  • Watering run times
  • Review menu displays accumulated ET deficits by zone
  • Display maximum run time and minimum soak time
  • Displays temperature readings (daily high/low) for previous 5 days
  • Accumulates total run times by zone from the last reset date
  • Clear deficits for all zones
  • Extended rain delay programmable from 0 – 99 hours


  • Manual test runs each zone with zone run times from 10 sec. – 10 min.
  • Manual zone operation of a single zone (1 min. to 9 hrs. 55 min.)
  • Push button manual start of a program from control panel


  • Fault review displays all faults, including open and shorted zones
  • Test function using on-board multi-meter
  • Built-in valve locator
  • Backtrack Stored Program™


  • Zone-to-zone delay
  • Master valve timing sequence with zone valve programmable
  • Master valve/pump start operation assignable On/Off by zone
  • Clear program function
  • Clear all function
  • Grow-in program
  • Two independently programmed master valves
  • Normally open or normally closed master valve operation
  • Real time milliamp display
  • Flow sensor data review (requires SmartLink® Aircard)
  • Real time flow display (requires SmartLink® Aircard)