| 摘要 |
PROBLEM TO BE SOLVED: To provide a pumping drainage system capable of suitably preventing a decline in the drainage capability without using a ventiduct for communicating the indoor and outdoor sides with each other.SOLUTION: A pumping drainage system A includes a drainage tank 2 for temporarily storing drain discharged from water supply/discharge facilities 1 installed inside a building, and a force feed pump 3 for forcibly feeding the drain to be discharged from the drainage tank 2. It further includes a communicating pipe 7 for communicating the drainage tank 2 with a drain pipe 5 connecting the water supply/discharge facilities 1 to the drainage tank 2, and pressure easing means 9 connected to a vapor-phase part in the drainage tank 2 and a series of communication paths R inside the communication pipe 7 for easing pressure fluctuations in the communication paths R.SELECTED DRAWING: Figure 1 |
