If I understand the procedure right the pipe in the pond goes to the depth plus about 4 foot lower. At the top elbow there is not anything installed? Or is there a tee to prime the lines and balls covering both ends? My pond is running higher than I desire since I connected the house gutters. I may try this syphon to correct my water level, I would use 4 inch pvc. I have read these posts many times to get the method and for protection.
