core/homeassistant/components/flume/icons.json

{
  "entity": {
    "binary_sensor": {
      "leak": {
        "default": "mdi:pipe-leak"
      },
      "flow": {
        "default": "mdi:waves"
      }
    }
  },
  "services": {
    "list_notifications": "mdi:bell"
  }
}