BeanAnimal - NOT self priming like it should!

[ScubaSteve]

I think I see it. Tough to perfectly tel from the pics but...

As mentioned previously, the line with the valve on the far right should be the full siphon. Turn that elbow down. Turn the others up. There is some debate to whether the secondary shoud be up or down but personally I don't think it matters as much as the full siphon. You aren't getting a prime because it's pointing up and getting air in the water column.

Also make sure that your caps are air tight. If they are leaking air, you're not going to get a seal.

Also, as mentioned before, drill a hole for the airline on the secondary.