This product is flow control device and it discharge all sewage water when it is fine weather. When it rains, only initial rainwater including NPS is discharged to sewage treatment plant. By this product, we can preserve the stream and efficently manage the treatment plant.

· Opens and shuts by non-motorized and simple structure and easy maintenance
· Control the flow depending on the amount of rainwater and sewage treatment plant for each area.
· Adjust buoy's angle and change the entrance (you can adjust amount of treatment and location of device)
· Rain water soil part is compact so you can applicate this product to existing water soil part as well.