Speidel 60L Spigot Tubing

[treacheroustexan]

I purchased a Speidel 60L from morebeer and went to transfer my Oktoberfest today. I used 1/2" ID tubing I had laying around and it seemed to fit pretty loose so I switched the transfer to my autosiphon because I saw a lot of air bubbles in the line. What size tubing are you guys using to transfer with your Speidels or should I just buy clamps and continue using the 1/2"?

 

[RPh_Guy]

3/8" is the correct size.