This is an example of how to get the auto water valve I purchased of Amazon.com to automatically shut off the water in the event of a detected leak. I will be adding the full process to this post in the next few weeks. This is just a placeholder until I do complete this Howto.

The Automation

Full Yaml File

alias: _MainWaterOffWhenLeakDetected
description: ""
trigger:
  - type: moist
    platform: device
    device_id: 2d5f68e651c6b32c9a71fc3f1da48ae0
    entity_id: dc8581dea015c39f281d693f4a0d8f7d
    domain: binary_sensor
    id: When Main Water Detected Water
  - platform: event
    event_type: timer.finished
    event_data:
      event id: timer.attemptwaterturnon
    id: When Attempt Water Turn On Done
  - type: not_moist
    platform: device
    device_id: 2d5f68e651c6b32c9a71fc3f1da48ae0
    entity_id: dc8581dea015c39f281d693f4a0d8f7d
    domain: binary_sensor
    id: When Main Water Became Dry
  - device_id: 1940ec1fe051d5b132268a98584ebce3
    domain: zha
    platform: device
    type: device_offline
    subtype: device_offline
    id: Main Water Valve turned on or off
condition: []
action:
  - choose:
      - conditions:
          - condition: trigger
            id:
              - When Main Water Detected Water
        sequence:
          - if:
              - condition: device
                type: is_on
                device_id: 1940ec1fe051d5b132268a98584ebce3
                entity_id: 0f8e6f9d665fc5b0565077bd4116128b
                domain: light
            then:
              - type: turn_off
                device_id: 1940ec1fe051d5b132268a98584ebce3
                entity_id: 0f8e6f9d665fc5b0565077bd4116128b
                domain: light
          - service: timer.start
            data:
              duration: "1200"
            target:
              entity_id: timer.attemptwaterturnon
          - service: notify.ha_email
            data:
              message: Main leak detector has detected a leak.
              title: Main Leak Detector Triggered!!!
          - service: notify.ecobee
            data:
              message: Main water detector  has detected a wet condition.
              title: Main water detected wet condition...
              target: 0
          - service: media_player.play_media
            target:
              entity_id: media_player.m5stack_atom_echo_889034_m5stack_atom_echo_889034
            data:
              media_content_id: >-
                media-source://tts/tts.piper?message=Water+main+off+due+to+detected+leak%21&language=en_US&voice=en_US-lessac-low
              media_content_type: provider
            metadata:
              title: Water main off due to detected leak!
              thumbnail: https://brands.home-assistant.io/_/tts/logo.png
              media_class: app
              children_media_class: null
              navigateIds:
                - {}
                - media_content_type: app
                  media_content_id: media-source://tts
                - media_content_type: provider
                  media_content_id: >-
                    media-source://tts/tts.piper?message=Water+main+off+due+to+detected+leak%21&language=en_US&voice=en_US-lessac-low
      - conditions:
          - condition: trigger
            id:
              - When Attempt Water Turn On Done
        sequence:
          - if:
              - type: is_moist
                condition: device
                device_id: 2d5f68e651c6b32c9a71fc3f1da48ae0
                entity_id: dc8581dea015c39f281d693f4a0d8f7d
                domain: binary_sensor
            then:
              - service: timer.start
                data:
                  duration: "1200"
                target:
                  entity_id: timer.attemptwaterturnon
              - service: notify.ha_email
                data:
                  message: Main water detector  has detected a wet condition.
                  title: Main water detected wet condition...
              - service: notify.ecobee
                data:
                  message: Main leak detector is wet!!!
                  title: Main leak detector is triggered!!!
                  target: 0
            else:
              - service: notify.ha_email
                data:
                  message: Main water detector is no longer wet
                  title: Main water detector is good.
              - service: notify.ecobee
                data:
                  message: Main leak detector is clear!!!
                  title: "Main leak detector is good!! "
                  target: 0
mode: single