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Discuss Column radiator not getting hot in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Paul hayes

    Paul hayes New Member

    I’m after some advice, I’ve a combi boiler heating up 8 radiators and I’ve replaced one with a large column radiator, it’s being fed buy 10mm microbore, it gets warm but doesn’t get as hot as the feed pipes, the radiator heats up fine, no cold spots, all the rest of the radiators in the house get hot, the radiator is 350 /1800mm double panel, I’m considering putting the feed in the top corner so the water has to flow all the way through, the other options I’ve considered is replumbing with 15 mm at the bottom to get more flow, anyone got any advice before I start altering it
    Cheers

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  2. Jamie Liffen

    Jamie Liffen GSR

    thats a big radiator for 10mm pipes. is that the only radiator on the pipe drop? system may need balancing to push more flow to this rad.
    is this radiator the furthest from the boiler ? dont bother increasing the pipes to 15mm its pointless for the amount of pipe showing.
     
  3. scott_d

    scott_d Plumber GSR

    Is it directional?
     
    • Agree Agree x 1
  4. Paul hayes

    Paul hayes New Member

    The pipes are reduced above the radiator so if it was replumbed it would be fed from above connected to 15mm pipes where it reduces down to the 10mm
     
  5. Paul hayes

    Paul hayes New Member

    What do you mean directional
     
  6. scott_d

    scott_d Plumber GSR

    Flow should go in one side and out the other
    Some have a spreader tube to direct the water to the top
     
  7. Chewitt

    Chewitt New Member

    Check the installation instructions. A lot of vertical radiators have a baffle fitted, the radiator maybe upside down.
    I sell radiators and it is a common mistake.
    There may have been a coloured sticker to indicate the bottom of the rad.
     
  8. Paul hayes

    Paul hayes New Member

    How can you tell it’s upside down, it’s been fitted over a yr
     
  9. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Some are , some aren't, in my experience the expensive ones are bidirectional, usually have a sticker saying F and R
     
  10. Cailean

    Cailean Member

    Too big for 10mm. Water will take the easiest route and it isn't wanting to climb up that mountain and back down again.
     
  11. Paul hayes

    Paul hayes New Member

    have been on best heating website who we bought it off, and read fitting instructions and it doesn’t mention anything about which way up or round to fit it.
     
  12. Paul hayes

    Paul hayes New Member

    Think it’s going to have the feed to the top and return at the bottom to force the water through it
     
  13. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    I daren’t ask , Victorian plumbing , please say no
     
    • Funny Funny x 2
  14. Paul hayes

    Paul hayes New Member

    No, new central heating system fitted by my father, microbore is fed off the pipes upstairs, and chopped into the walls, it’s a modern system
     
    • Funny Funny x 1
  15. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    No wheres the rad from
     
    • Funny Funny x 2
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