[smagown]

Some plumbers are using nitrogen to braze with as it is much cleaner inside the pipe when finished, but I'm eliminating at least the three manifolds:the output, the return, and the engine circulation , which is the pump down at the bottom in the photo, even tho it hasn't leaked yet. The manifold that supplies the pumps to the three zones has been my problem area. I'm only going to need a threaded fitting on the faucet end, two T's with barbs, and an elbow with a barb at the far end to connect to the bottom of the three pumps to make up the manifold.