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Adding new radiator

Discussion in 'Plumbing and Central Heating' started by rreanor, 4 May 2021.

  1. rreanor

    rreanor

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    I'm looking at adding a new Radiator to a bedroom which currently doesn't have one. All the Pipework upstairs is 15mm. Does this matter? I read somewhere that adding new rads to 15mm circuit can cause problems because of the flow rates.

    There are currently only 6 rads in the whole house. The 2 downstairs rads are fed on a 22mm circuit which reduce to 15mm just below the first rad. All the rads upstairs run off 15mm pipework.
     
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  3. Mottie

    Mottie

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    I can’t see it being a problem but you may need to balance the system afterwards. I did the same in my house adding one rad to the upstairs landing, another to a newly created downstairs wc. I just teed off of existing 15mm pipes.
     
  4. rreanor

    rreanor

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    When you say balance the system what do you mean?
     
  5. Mottie

    Mottie

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    You may have to turn the return valves down slightly on other rads if the new rad is not getting hot. Only maybe though. Look it up on here.
     
  6. John the plumber

    John the plumber

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  7. Mottie

    Mottie

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    Feel free to chip in and help the man instead of making silly faces. You are supposed to be a helpful chap according to that newspaper article you posted and your Social media page.
     
  8. John the plumber

    John the plumber

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    How on earth would you know what my social media pages look like ?
    Your not still stalking me surely?
    (I think we both know the answer to that)

    Seeing as your a recently rather regular poster to the plumbing forums it’s nice to see that other tradesman are helping out people with their problems.(y)
     
  9. Lower

    Lower

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    Each radiator has 2 valves on it. One you use to adjust how much heat that radiator puts out on a regular basis and usually has a temperature controlled valve on it (TRV) and one that you wouldn't normally touch that normally has a plastic cover over the spindle. That is the balancing valve, its normally on the inlet to the radiator and is normally only used when the heating system is installed and set up.

    You use the balancing valve to control how much of the hot water from the boiler flows through each radiator which enables you to get the same amount of heat from each radiator. If it wasn't there, you might find that the radiator closest to the boiler ends up really hot, but the radiator furthest from the boiler doesn't even get warm.

    If you add a radiator into the system, you may have to rebalance the system to compensate for the added heat load so that all radiators continue to put out the same amount of heat.
     
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  11. rreanor

    rreanor

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    I've added it now, although it took a fair amount of balancing and the 3 rads after it were stone cold. All the return valves are open 1/4 turn and all rads are hot. The one thing I notice is that the return pipework is virtually as hot as the flow. Shouldn't it be colder?
     
  12. Mottie

    Mottie

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    You mentioned it in that article you posted. I think there was a link on there. Was there a link on there or was I just imagining it?

    Anyway, I think between myself, Lower and Harry we’ve helped the OP out so you can stand down now. (y)

    Anyway, how would you know whether I’m a recent poster to the plumbing forum - I’ve been a member on this site for three years longer than you. Have you been going through my old posts?
     
    Last edited: 4 May 2021
  13. Harry Bloomfield

    Harry Bloomfield

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    Hot water in the pipes, naturally prefers and takes the easiest route from boiler flow to boiler return - that can mean some rads receive little or no flow. Balancing involves tweaking radiator valves, to restrict the flow through some radiators, to favour flow into others.
     
  14. John the plumber

    John the plumber

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    An article I posted? (I’ve not posted any articles regarding my social media pages)
    Thank you for giving me your permission to “stand down”.:D
    Glad your wrists have healed ;) and glad the op has it sorted.
    I will make sure I seek your permission as to where and when I can post on these forums in future seeing as you say where and when people can post.
     
  15. Mottie

    Mottie

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  16. John the plumber

    John the plumber

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    So you chose to go to my social media pages after I changed my avatar lol.
    Wow
    Being forgotten doesn’t constitute searching for people on social media after somebody changes their avatar and no worries.
    As you say all forgotten now (by me at least).
    I’ll leave you to it :mrgreen:
     
  17. Mottie

    Mottie

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    Did I?
     
    Last edited: 4 May 2021
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