I would get some 4 inch thinwall PVC and ells as necessary, and glue it up to be a siphon over the pond bank. Then I would use the the gas pump to fill the pipe and start the siphon. Corrugated pipe is so hard to seal at the joints, that I doubt it would maintain a siphon due to air leaks.

Last edited by John F; 01/08/17 06:38 PM. Reason: added sentence