Heating Rads A Strange One !!!

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by fitsjohn, Nov 10, 2006.

  1. fitsjohn

    fitsjohn New Member

    Nov 10, 2006
    hi there folks,Hope you can shed some light on a problem I am having . I have a 40 year old house plumbed with copper piping and A solid fuel stove which is really effecient i think and heats my emmersion easily. The water supply also is also set up to run the rads in the house .
    The problem is it heats the first 3 rads to almost boiling and none of the rest of the house at all .
    I have had plumbers in who have bled the entire system numerous times .
    we have installed circulation pumps at the highest point in the system and at the lowest point ,reversing pumps,1 pump at a time ,2 together and cant figure out the problem.

    Any thoughts appreciated,Thanks john
  2. Bob NH

    Bob NH In the Trades

    Oct 20, 2005
    New Hampshire
    More information would help.

    What kind of radiators? The big standup type, or copper fin baseboard?

    Is the system using water circulation or steam?

    If water, is it pressurized? What is the pressure and how is it maintained?

    If steam, what is the pressure?

    What's an "emmersion"?

    Why a circulation pump at "the highest point in the system"? That is not the place to put it.

    It's an old house. What was changed between the time it worked and now?

    Are there air vents at the high points in the system?

    Is there an air scoop and air vent near the boiler?

    Is there an expansion tank in the heating loop?

    How many zones and how are they controlled?

    How do you get makeup water into the system?

    Tell us a bit more and maybe someone can give you some suggestions.
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    If 2 plumbers working on it there, even if they are not too familiar with wet heating, cannot come up with a solution, rather than just installing and changing things hoping it will cure the problem, then how would we be able to do any better without even seeing your system. There might be many possible causes, and it is possible that not all radiators are being affected by the same problem.
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