Thanks for such a wonderful thread! I'm going to build one this weekend and had a couple of questions that I'm not sure were answered in the thread. I read through twice hoping to not re-ask an answered question.
1. I would like to install a UV lamp in-line on the supply piping, and want to give the water a little more dwell time with the UV rays. Will using a 4" pipe disrupt the overall scheme of ratios with stone and pressure or will I just have to adjust the flow with a ball valve to account for the difference? Or should I just build a separate device in-line but outside the container. I'm trying to be space conscious.
2. Can I use the supply line as the air line as well, as long as there is a ball valve "T" that I can close when boiling the water and there is a sufficient manifold at the bottom to evenly distribute both water / air? (as I'm typing this, it occurs to me that they may need to be separate so that I can flow both at the same time.) In streaming consciousness.... would the air pressure disrupt the UV light if in the supply housing...?