When trying to bottle my beer, the beer will foam up in the siphon tube. I can get it going but you can see small bubbles through out the tube which never get ejected through the end of the tube (bottle filler). The beer comes out very foamy and when the bottle filler valve is closed to fill next bottle the air in the tube rushes to make a air gap at the top and then the beer runs down the part of the tube in the carboy making a large air gap. And then i have to try and get the siphon going again over and over and over.
Its as if the beer is being agitated or hitting turbulance when its in the tube. Its like its reacting and bubbling up like crazy for some reason. Everything is super clean and temperatures are equal (between tubes and beer). 
THE PROBLEM IS NOT AN AIR LEAK. Everything is so tight i have to cut it to get it apart. I am using the correct sizes of equipment (5/16 I think) and had it inspected and tested and tried 3 different sets. I also tried an autosiphon with my neighbors tubes - which he uses. and same issue.
I've spoken to many experts and done so much research and have yet to get an answer on why this is happening. People have told me they syphoned with extreemly carbonated liquids using my method with no problem. So maybe overcarbonation is not the problem. Maybe something to do where I have a yeast cake sitting on the bottom.
Also something else to note, when I added my sugar solution (used that malty stuff this time - dextrose plus something else) to each bottle, the beer would react to the sugar solution like a volcano.
Kit: Festibrew Double Oatmeal Stout
Yeast: WYeast American ale 1056
Primary Only: 23L Carboy 2 weeks @ 19 degrees, 1 week @ 16.5 degrees
I use a racking cane, spring loaded bottle filler, and syphon tube.
Its as if the beer is being agitated or hitting turbulance when its in the tube. Its like its reacting and bubbling up like crazy for some reason. Everything is super clean and temperatures are equal (between tubes and beer). 
THE PROBLEM IS NOT AN AIR LEAK. Everything is so tight i have to cut it to get it apart. I am using the correct sizes of equipment (5/16 I think) and had it inspected and tested and tried 3 different sets. I also tried an autosiphon with my neighbors tubes - which he uses. and same issue.
I've spoken to many experts and done so much research and have yet to get an answer on why this is happening. People have told me they syphoned with extreemly carbonated liquids using my method with no problem. So maybe overcarbonation is not the problem. Maybe something to do where I have a yeast cake sitting on the bottom.
Also something else to note, when I added my sugar solution (used that malty stuff this time - dextrose plus something else) to each bottle, the beer would react to the sugar solution like a volcano.
Kit: Festibrew Double Oatmeal Stout
Yeast: WYeast American ale 1056
Primary Only: 23L Carboy 2 weeks @ 19 degrees, 1 week @ 16.5 degrees
I use a racking cane, spring loaded bottle filler, and syphon tube.