core/homeassistant/components/valve/icons.json

{
  "entity_component": {
    "_": {
      "default": "mdi:valve-open",
      "state": {
        "closed": "mdi:valve-closed"
      }
    },
    "gas": {
      "default": "mdi:meter-gas"
    },
    "water": {
      "default": "mdi:valve-open",
      "state": {
        "closed": "mdi:valve-closed"
      }
    }
  },
  "services": {
    "close_valve": {
      "service": "mdi:valve-closed"
    },
    "open_valve": {
      "service": "mdi:valve-open"
    },
    "set_valve_position": {
      "service": "mdi:valve"
    },
    "stop_valve": {
      "service": "mdi:stop"
    },
    "toggle": {
      "service": "mdi:valve-open"
    }
  }
}