Ricardo Villamil
New Member
Hey guys, I just bought a 20y/o house with an oil boiler and three heating zones. From what I can tell, there's one circulator pump for all three zones and three zone valves (there's another circulator pump which I'm not sure what it does. It is also a bit noisy but not much). One of the pumps makes a loud grinding noise through out the house BUT only when one zone is active, as soon as a second or third zone activate, it quiets down. I'm not super familiar with these systems so please bear with me!
Here's a quick video I shot:
What do you guys think? Thanks!
Here's a quick video I shot:



What do you guys think? Thanks!