Absorber fins and painting are done! I did my best to make everything an equal length, but I'm sure each run will be off a bit.
Does anyone have an idea how much difference in flow there might be between the 4 loops or how much this could impact performance? Say if there were 6-9" differences in loop lengths? Extra valves & gauges to balance things perfectly could add up. Maybe adding ball valves & use an IR camera with glazing off to see imbalances? I'm guessing higher flow in one loop would show up cooler than the others?
Anyways, the next step is digging a trench for the piping. I will be laying draintile underneath the wrap style insulated pipe to protect it from getting water inside of it. It will have the added benefit of keeping the yard & basement a little dryer!