essup,
I have a 2" trash pump and I hooked it to the tee at the top of the dam and closed off the outlet pipe in an attempt to force water out through the inlet. I got nothing. When I released the plugged end of the outlet pipe I assumed that the section from a 12" pipe would break something free, nothing changed.
In reference to your comment about the corrugated pipe, I can buy a 100' roll and won't have any fittings therefore no air leaks to beak the siphon. I plan on making a handle to hold the end of the corrugated pipe so that I can operate it from inside a john boat. If I just keep breaking up the mud and muck, the vacuum created from the hose should suck it up.
Dean
