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Water Noise From Baseboard Loop
I need some help with how to eliminate a unpleasant sound coming from a hot water heating baseboard loop. The problem area is in the second floor of a large residence. The other two zones of the second floor are operating fine and as quiet as it should be.
When the zone pump starts it sounds like a "running brook or small stream". Sometimes the noise remaines and other times it goes away. Room temperature maintains set point and the customer is happy except for the noise and only in this one noisy zone.
The system is equipped with six zone pumps, pumping away piping configuration. HW loop is equipped with a Spirovent air seperator and we leave the city water make valve open at all times. I vented air from the loop but the noise remaines.
Looking for recommendations
Thank you, Bill