I'm not quite sure how yet, but I'm going to attach the H20 input manifold here. I went over and over in my head how and where to do this. I finally took a break from thinking and just cut a pipe on a 45, welded it into a right angle, and slapped it on the base frame. I went back to thinking (now that it's permanent) and the break didn't help... Still not quite sure yet how I'll attach it. Oh well, something will come up. FYI, yes that is galvenized pipe. Galvenized pipe contains zinc that gets released in the fumes when welded. You will probably die if you do this, so don't. Ok, in honesty, I did read up on it and they did advise not to in most cases, but at the same time there was a general consensus that if you stay out of the smoke you'll be fine. I made very sure to have the area very well ventilated and stayed upwind of the cloud. It's only been about 12 hours, but I'm happy to report that I'm still alive.