| 摘要 |
PROBLEM TO BE SOLVED: To embody the shortening of the time for washing a water distributing pipe, the lessening of labor and the saving of water. SOLUTION: A water interruption block is created by closing a sluice valve 2 and a sluice valve 3. The water distributing pipe 1 near the sluice valve 2 within this water interruption block is provided with an insertion part 4 for a washing appliance and the washing appliance, such as poly pig, is inserted by a washing appliance insertion side device 6 therein. Next, the sluice valve 2 is opened to feed water into the water distributing pipe 1 and to feed air into the water distributing pipe 1 from the insertion part 4. A pump is operated to suck the water and air in the water distributing pipe 1 in a washing appliance take-out device 7. The washing appliance washes the inside of the water distributing pipe 1 in the process of moving in the water distributing pipe. The water fed into the water distributing pipe 1 collides against the washing appliance and air pockets, by which the water is moved back and forth in the water distributing pipe 1. The inside of the water distributing pipe 1 is washed by the effect thereof. |
