here is a pic of the manifold i built using 1/2" ball valves, the small 1/4" 'watts" valves are so hard to turn on/off, sorry too much time on my hands due too weather!!
Jay.. dumb question. Wouldn't it have been cheaper, or at least the same price, and more compact to just build the entire thing out of the John Guest tubing fittings? Seems like there'd be a lot of extra water sitting in the PVC manifold. I assume you already had all of the PVC fittings. With that said, being a PVC junkie myself, I can never fault any well-constructed PVC creation.