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  1. #1
    Join Date
    Mar 2013
    Posts
    8

    Default Water Basebaord Heat - Noise Issue

    Hi There,

    I have a 1950's house with original water-based whole-house baseboard hydronic heating system. Maybe the re-circ pump is newer, but the rest of it looks original. It still works really well too, apart from the water trickle noises (which are fairly loud when there's no other noise in an otherwise quiet house).

    I know I am getting air in the system and I assume it must be from air in the supply water. If I bleed my system by connecting a hose and draining until air noises/bubbles stop, the system is then good again for 3-5 days and then the water trickle noises start to come back. I can then repeat this cycle once a week.

    I have what I initially thought was a flow control valve, but now (after seeing some pics on-line) believe it to be a Air Relief/Scoop valve. Can someone confirm if this is the case (please see photos in zip attachment - couldnt get jpgs to upload). As you can see, its been painter over long ago (not me!) and am wondering if this has ceased and is now longer functioning.

    It seems like it would be an easy replacement, so if someone can point me in the direction of a suitable replacement I'd really appreciate it (the pipe is 1 1/2" dia).

    Thanks.
    Attached Files Attached Files

  2. #2
    Join Date
    Dec 2012
    Location
    New London County, CT
    Posts
    99

    Default Re: Water Basebaord Heat - Noise Issue

    That looks like a check valve to me. My system as an air scoop above the expansion tank, is yours possibly there? What you describe is air in the line, especially because it will go away after purging.

  3. #3
    Join Date
    Feb 2013
    Location
    The thumb, MI
    Posts
    54

    Default Re: Water Basebaord Heat - Noise Issue

    Do your baseboards have air bleeds installed? Often there's a screw cap on one of the elbows in each. Open it and see if it hisses air--close it when water squirts out. This is preferable to a single purge location.

  4. #4
    Join Date
    Feb 2013
    Location
    The thumb, MI
    Posts
    54

    Default Re: Water Basebaord Heat - Noise Issue

    I think you were correct that that is a flow control valve.


  5. #5
    Join Date
    Feb 2010
    Location
    South*East
    Posts
    1,183

    Default Re: Water Basebaord Heat - Noise Issue

    That is a flow check. What type baseboard do you have? Is it copper fin or cast iron? Also is your system a one pipe or loop system? A one pipe system has one line that runs from the feed on the boiler, around the basement then back to the return to the boiler.

    John

  6. #6
    Join Date
    Mar 2013
    Posts
    8

    Default Re: Water Basebaord Heat - Noise Issue

    Hi, thanks for the responses.

    Out of my entire system, the only things other than the baseboards, recirc pump and boiler is this 'check valve'.

    I don't have an expansion tank or I guess an air scoop device. As I say, everything looks original and doesn't look like its been touched for a generation(apart from some general maintenance and myself replacing a long stretch of pipe in another room that had been corroded).

    I've attached the other pictures that show the recirc pump and the split into two zones. I can get more pics later if needed. I just took them of the pump (thinking about replacing as its not as quiet as I would like) and the check valve.

    Would it be feasible to just add in an air scoop?

    The system has baseboard heaters that run the outside walls of the perimeter of the house. The pipes are all galvanized steel and are in good shape. My home is a split level with no basement - the setup is in my laundry room.

    Dont hold the dirt and grime in the pics against me - the house was a fixer upper and we're currently working on this, our last room!!

  7. #7
    Join Date
    Mar 2013
    Posts
    8

    Default Re: Water Basebaord Heat - Noise Issue

    Sorry, forgot to attach pics (see zip).
    Attached Files Attached Files

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