I capped off the spiro and isolated the manifold and purged one loop at a time and then purged the entire system after this. The sprio was the problem drawing air into the system. It took an hour and a half, but all of the air is out. Unfortunately that did not solve my problem. I ran my pump by itself afterwards and as soon as I turned on the hwh it was reading .3gpm and would not turn on. If I restart it the hwh will turn on, but it only take a few minutes for it to go back down and shut off. I changed the psi to 25 and this did not help. The pump was working fine the first two days so I am not sure if i damaged something or what, but at this point I think I need someone to look at it for me. Does anyone know of someone in the SE Michigan area?