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Noisy Open Honeywell Zone Valve

sarnonesarnone Member Posts: 1
edited January 2015 in Radiant Heating
Hi all, I have three Honeywell v8043e. One of the valves, when open, makes a, what sounds like either a water noise or like metal tumbling around right at the valve. It is clearly the oldest of the zone valves. I have recently changed a seized motor on this valve. It appears to pass hot water when it's supposed to, but it is on a zone that doesn't keep more than 65 degrees on a 20 degree day. It is a large room but appears to have adequate baseboard.
Had a clean and check done and air has been bled. Other zones work well enough.


  • shadow6191shadow6191 Member Posts: 3
    have you tried the following: when the piping is cold in this zone and the valve is off (closed), turning another zone on and seeing if the piping for this zone heats up? if it does, the ball inside the valve is broken, not typical. only other thought is that there is debris or something else that has crudded up the valve flow path to restrict flow in some way
  • hot_rodhot_rod Member Posts: 13,313
    As shadow mentioned there is a butyl ball attached to the shaft inside, these can wear, erode, harden and even disengage from the shaft. Only way to know is remove the top mechanism from the brass body. Isolate the water first, somehow.

    We have cycle tested a bunch of various brands of ZV, they all have a life expectancy, greatly dependent on how often they cycle, fluid quality and operating temperature. 10 years is a realistic service life.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
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