Hi,
I am not too familiar with Valves. I have to select one to add at the end of a 12" PVC pipe that drains a man made lake when we want to lower the water level during the rainy season. So for the most part, there will be very little pressure in the line. Someone recommended a plug valve...
I see that most standards state to slope the inside of a catch basin at 1:12 (8.33%) minimum towards the outlet pipe. Has anyone seen a deviation from this?