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Discuss Pipe size for unvented cylinder and boiler in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Stants

    Stants Member

    hi I have an issue with running pipes ( the route )for a boiler and and unvented cylinder
    1 can you combine bother together ( t one into the other)
    2 if so what s the minimum pipe size for both ? As I have to either go over , under or dare I say through a steel .. it's in a loft Con
    Thanks
     
  2. rpm

    rpm Trusted Plumber Top Contributor!!

    What will be in these pipes?
     
  3. Stants

    Stants Member

    Water and hot water
    1 for the condensate pipe for the boiler
    1 for the discharge/ outlet for unvented cylinder
     
  4. rpm

    rpm Trusted Plumber Top Contributor!!

    In that case you need to make a water slide, no going down-up-down again.
     
  5. Stants

    Stants Member

    Its a lot to explain why but all I'm asking is the minimum size pipe needed I would never go up , down and up it's all to do with height of the steel I put in I have options with that ( height wise )
     
  6. rpm

    rpm Trusted Plumber Top Contributor!!

    Then I`m sure somebody with knowledge will be along once they have finished work with the answer. ;)
     
    • Like Like x 1
  7. Stants

    Stants Member

    Ok thanks
     
  8. sammathias

    sammathias Plumber GSR

    Depends on distances... Or just use a pump.
     
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    expensive way to do things over £550 for a pump
     
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    you can combine them but they must be able to take the full load best let your g3 and gas engy size them as there is a formula
     
  11. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    As above^^^^ the diameter of the discharge pipe is dependent on elbows and length , no one is the same .
    Boiler condensate pipe MUST be run in plastic . Boilers are fitted by qualified guys .
     
    • Like Like x 1
  12. scott_d

    scott_d Plumber GSR

    Which ones are you planning to combine?
    Are you useing copper or plastic?
     
  13. Last Plumber

    Last Plumber Plumber GSR

    Condensate Must be plastic and PRV or TPRV must be able to take the heat.
     
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