Which Rachio smart sprinkler controllers should I buy?
The Rachio 3 is Rachio's sprinkler controller on sale, in 8-zone and 16-zone versions that connect over Wi-Fi.
Rachio lists Alexa, Google Assistant, Apple Shortcuts, IFTTT, Alarm.com, Control4 and Nexia for its sprinkler controllers.
Outdoor installs need the separate Rachio 3 Weatherproof Enclosure. The EveryDrop Flow Meter connects to a Rachio 3 or Generation 2 controller and adds flow data and leak alerts in the Rachio app.
Rachio's model list also names 4-zone, 6-zone and 12-zone Rachio 3 models and the Generation 1, Generation 2 and 3e controllers.
Currently sold
Newest first in each series.
Models sold now, newest in each series
3 models. List prices as of Oct 17, 2026How facts are sourced: every cell cites its source below
The number before ZULWC is the zone count of the Rachio 3.[1]
PS, BLI and USI endings
PS marks a Pro Series model, BLI an Indoor Pro Series model without the weatherproof enclosure. Rachio lists USI as another ending without saying what it means.[1]
ZULWB and ZULW
ZULWB is the Generation 2 controller and ZULW the Generation 1 controller.[1]
PS at the end marks a Pro Series model, BLI marks an Indoor Pro Series model without the weatherproof enclosure, and USI is another listed ending. Generation 2 controllers are 8ZULWB and 16ZULWB, and Generation 1 controllers are 8ZULW and 16ZULW.