Well, I've used mine on two batches now and I have some thoughts. Halfway thru the first batch I was kicking myself for having installed these. The tube has a very tight ID and so if any gas bubbles get in there, like when your wort is boiling merrily away, you are screwed. The ID is too small for the bubbles to readily pass up to the top of the tube, they just sit there and clog up the works. And you just drilled a 9/16th inch hole in the bottoms of your keggle and mash tun in order to install them. You can't take it out and it doesn't work left in. AAAArrrgh.
But wait, things aren't that bad. I was worried about the potential problem of losing an entire batch by snapping off the tube while either mashing or boiling because there is not a way to stop the flow if that happens. I backed out the compression fitting, added a shut off valve and installed a bigger piece of tubing with a larger ID. And it works well now. I'd say it's a decent design with a flaw that was relatively easy/inexpensive to fix. I'm not trying to hammer you or your design. It was pretty clearly a prototype and prototypes, by definition, aren't perfect. I doubt I would have gotten off my ass and installed one if you hadn't done the legwork, cobbled together a few, and offered them at a very reasonable price. But you would be well advised to increase the size of the tube, and to add a shut off valve above the elbow and below the tube. I also added an eyebolt at the top of the keg to catch and hold the top of the tube. Also, I had to pony up $22 bucks for a 9/19" drill bit to install the thru hulls. And the larger compression fitting and tubing added more $$ to the final bill. Dammmit!
Ya, on second thought, I still wish I hadn't jumped for these
But other than THAT, how did you enjoy the play, Mrs Lincoln?
PTN