| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain pipe unclogging device which can unclog a drain pipe interposed between an oil separation treatment tank and a sewage pipe, and which prevents air bubbles from being mixed into water.SOLUTION: A drain pipe unclogging device 1 includes a pipe-like water storage pipe 6 that is provided with an opening 5 for supplying water to hollow water push-out means 4 having a volume decreased by being pushed, and air removal means 8 for removing air within the drain pipe unclogging device 1 by supplying water into the drain pipe unclogging device.SELECTED DRAWING: Figure 3 |
