Yep, very simple, but beautiful.

You've got about 256sf of panels. I will have about 134sf for my 15 x 30 AG. I remember reading somewhere here that it's quantity of water thru the panels that gives the most hot water. I sure did that last year with forcing all 1.5hp thru 2 panels that measure 3 x 9 each!

I do see some flexible pipe in the right side of the pic. Is that connected any way or is that just some hose for vaccuming? I currently have everything connected with white flexable hose, but would like to go to pvc. How much $$ do you have invested in the materials (pipes and knobs) would you guess?