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  1. M

    Single pipe system problem

    Hi Thanks you for the info I will take the tops off the TVR's to change them to a regular valve and see if that helps. Cheers
  2. M

    Single pipe system problem

    Hi We have tried switching the working rads off but not much success, the warmth has moved a little along the pipe but the radiators are still cold. I did indeed put 2 TVR's on the new rads, one loop. Thanks
  3. M

    Single pipe system problem

    Hi I have replaced 2 radiators on my single pipe gravity fed system and now only the first 4 of our radiators are hot the other 6 are cold. We have drained the air out of the radiators but they are still cold. Any suggestions please Thanks in advance :?
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