What does the 4 coex pipe in the catch basin do?
Installing coex pipe in the catch basin, or pondless area, will create more room for water to collect. Many people just fill the catch basin or pondless area up with rock. By doing this you are taking up valuable space where the water needs to collect. Consequently, you have to dig a much bigger basin to hold enough water to run your system. Using coex pipe allows us to have a smaller catch basin, while still holding enough water to run the stream. For proper installation of the coex pipe refer to chapter five in the video.
