Hoping to get some guidance.
I just re-connected my basement heat zone (#3). When circulating water, the flow/check valve, a Watts Model 2000S, rattles. The sound stops if I turn the thumb screw counter clockwise a half turn or so. But I'm pretty sure that is not the solution.
Can you advise me what the problem might be? Should I rebuilt it? Could there be air in the system? I bled the system, but it is interesting to me because the heating elements (baseboards) are at ground level, and thus the lowest point in the system. There is a release valve on the intake side at the highest point, but I could see how air could get trapped at the check valve.
Any help is appreciated.
Hydronic Heat, Indirect Water Heater, No Hot Water, ...
air in pipes
antifreeze in hydronic heat system
Check Valve making loud noise
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