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Weathermatic - SmartLine 4-Station Indoor/Outdoor Controller (Expandable to 16 Zones) - SL1600

Save 54%
Original price $247.90
Current price $114.98
SKU SL1600

4-zone base model, expandable to 16 zones using SLM4 4-zone hot-swappable modules or SLM12-1600 12-Zone modules (Indoor/Outdoor rated)

Internal 120VAC/230VAC transformer with plug and play pre-installed 6 line cord (removable for conduit-wired installations)


  • 4 programs: A, B, C; program D can operate concurrently
  • 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 Weather Sensor 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 120VAC/230VAC transformer with pre-installed 6 line cord
  • 2 Watering modes: Basic Mode and Smart Mode
  • Basic Mode: User Controlled Conventional Operation
  • Smart Mode: Daily automatic programming adjustments


  • 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


9-1/8³ W x 10 ½� H x 4³ D
(23,2 cm x 25,7 cm x 10,2 cm)

Manuals & Literature


Installation Instructions

Quick Start Guide

Owners Manual



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