1) Combine the tank and the tank cover. See if the reverse flow prevention pipe is mounted in the tank cover. 2) Close the cover and combine it with the tank. After that, using the locking device on the side, lock the unit 　tightly. 3) Connect a cleaning device connection rubber pipe to the circular hole in the tank cover. 4) Connect the existing cleaning machine to the tip of the connection rubber pipe. 5) Connect a corrugate hose to the square hole of the tank cover. 6) Connect a desirable part to the tip of the corrugated hose. 7) Operate the cleaning machine for cleaning works.