Flow Check Valve Adjustment

[Greg S]

I added a 3rd zone with circulating pump to 2 zone system. I had rooms with 8 foot ceilings and one great room with 30 foot ceiling on same zone resulting in poor heat in that room. I separated out the 30 foot room baseboard radiators into a separate 3rd zone. In installing I opened the check valve throwing off the balance and now get no heat in some zones. Have Taco 3/4" adjustable valves on each zone.