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Heat zone drawing from tank. Reverse Flow.
Wood Boiler up to operating temp. One heat zone is on. Tank is charging.
Return side, dip tube to bottom of tank.
Temp. guage tapped into tank.
Air bleeder and exp. tank connection. Air bleeder approx 6" higher because that makes it the high point on tank plumbing.
Feed side. Air bleeder with connection to exp tank.
Feed side, 30# pop off for peace of mind.
Exp tank. Extrol 160. System pressure reaches close to 30# when tank is charged to 200* +. Small exp. tank but to my surprise it is working on my 1200 gallon tank.
First layer of insulation.
Notice reflective insulation in back. Starting to build box.
Return end of box.
Showing 3rd layer of insulation.