For the pond type siphon, you need a 4 foot, or more, outlet drop from the water level. Be sure to use an elbow on the outlet, tilted upward, to prevent the water in a slower flow situation from flattening out in the pipe and allowing air to enter...
To restart, you need to fill the pipe as completely as possible. The best way is to use a vacuum pump at the highest pipe point. use a test plug to cap off the outlet. Another way is to cap both inlet and outlet, install a sealable Tee in the high point and bucket fill the pipe, cap off your tee, pull the inlet side plug, then pull the outlet plug...
Last edited by Rainman; 02/26/14 12:36 AM.
