I've noticed a noise that sounds like air bubbles coming from the first floor baseboard. After doing a few things like raising the system pressure, draining some water, and throttling the various isolation valves, I got an automotive stethoscope today. I'm almost certain the noise is coming from the Taco 218 FloChk valve. If I move the valve some when it's running it makes a similar sound and the noise seems to be greatest near the valve. I noticed that when the other zone is running, even though I don't hear the noise in the house, I hear it in the basement, located and amplified by the stethoscope.
Now that I know what it is, I'm not that worried about it, but I wonder if there is something that can be done about it.
(PS: The circ loops are driven by Taco 007s.)
Thanks
![Noisy Taco FloChk Valves Noisy Taco FloChk Valves](https://www.hearth.com/talk/data/attachments/131/131452-0fc84df2e57f5850e2e608a2dc7f8699.jpg)
Now that I know what it is, I'm not that worried about it, but I wonder if there is something that can be done about it.
(PS: The circ loops are driven by Taco 007s.)
Thanks
![Noisy Taco FloChk Valves Noisy Taco FloChk Valves](https://www.hearth.com/talk/data/attachments/131/131452-0fc84df2e57f5850e2e608a2dc7f8699.jpg)