Howdy! I'm new to the forum.
I'm installing a solar heating system and had everything picked out, FAFCO panels with 2" pvc pipe. Long story short the guy that was selling the panels actually had 1.5" instead of 2", and I've already installed the PVC up to the roof. Should I just get some other panels with 2" headers or will it be no big deal and just use an adaptor for the 1.5".
I was just wondering if the flow would be much different. I plan on having 1 row of seven 4x10s and a second row of 4x12s above it.