-Functions

This device is installed as the non-return valve on the top of rainwater drainage pipes. It can lead rainwater above roof tanks to flow out in cooperation with rainwater pipes which are in the tanks.
If there are some abnormal conditions, such as damage of rainwater drainage pipes, the solution in the tank will gush out through the pipe. Therefore, this device can operates as a non-return valve to prevent plants or the surrounding environment of the plants from damage and disaster.