Quote Originally Posted by urbanfarmer

I can't really see the bell siphon from your picture, but it looks like you have several feet of pipe after the bell siphon... LOL!

Even if the siphon gets air in the force of the water siphon in the rest of the tube will keep the siphon going. That means the water flow is about right for this condition. Hummm...... I have seen videos where there have been long pipes after the siphon but they still stopped?

You probably hear a "gurgle gurgle gurgle" sound but it keeps on truckin' right? YEP! How'd you guess?

Good luck!
At any rate a picture is worth a 1000 words and I need to provide photos. I wonder if I need a larger diameter pipe after the siphon that will introduce more air, perhaps venting the drain pipe somehow, or maybe just getting rid of the elbow will do it. The force of the water comment made me think. Fluid dynamics is getting the best of me.

Thank you.