Ryan,
I just got off the phone with EasyWay Plastics of Georgia in regards to the Syphon Piping and the potential of it freezing in the winter. I was informed the only reason for the trap is to prevent the water discharge from washing out the back of the dam.
They said you can use what ever angle pipe I prefer 45 Deg or 22.5 Deg. My concern was the pipe freezing if flow stops since there will always be water in the trap.
