1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Gas - mixing galvanised, cast iron and copper

Discussion in 'Plumbing and Central Heating' started by jacko555, 23 Feb 2021 at 9:35 PM.

  1. jacko555

    jacko555

    Joined:
    5 Feb 2005
    Messages:
    337
    Thanks Received:
    42
    Country:
    United Kingdom
    Just curious really.

    Is it allowed to mix the 3 types of gas pipe?

    Am reworking the kitchen and gas man came to quote to disconnect/decommission the gas pipes we have, and run new copper pipe to the cooker and boiler.

    This was my request, rather than necessity, as he can route the new ones out of sight, rather than what we have (cast iron running up walls, appearing in odd places, like the hallway wall, etc etc etc). He will leave the cast iron pipes "safe", so I can remove as I continue ti renovate the house.

    Anyhow, he looked at the current setup and said it was bad, as there new galvanised connectors from the meter, connecting to old cast iron that feeds the house, then an adaptor to copper from cast iron, to feed the combi boiler and existing cooker.

    20210223_212640.jpg

    Just curious really, as it's all going tomorow, but was it against any regs, or just "bad practice" to mix, or, was it fine?
     
  2. Sponsored Links
  3. muggles

    muggles

    Joined:
    28 Oct 2005
    Messages:
    12,578
    Thanks Received:
    2,760
    Location:
    Daventry
    Country:
    United Kingdom
    More likely to be the pipe sizing than the mix of materials that's the issue there.
     
    • Thanks Thanks x 1
  4. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    19,767
    Thanks Received:
    7,698
    Location:
    Lanarkshire
    Country:
    United Kingdom
    You wont have cast iron gas pipes inside your house
     
  5. jacko555

    jacko555

    Joined:
    5 Feb 2005
    Messages:
    337
    Thanks Received:
    42
    Country:
    United Kingdom
    Gas man said they were cast iron. Maybe he meant the connectors? Pipes arent copper
     
  6. Jackrae

    Jackrae

    Joined:
    20 Nov 2012
    Messages:
    2,151
    Thanks Received:
    354
    Location:
    Dumfriesshire
    Country:
    United Kingdom
    None of the pipes or fittings you show are cast iron. The couplings are forged steel. It gives cause for concern that the "gas man" thinks they are cast. Next time you see him I'd suggest you ask to see his 'gas-safe' ticket
     
  7. Sponsored Links
  8. jacko555

    jacko555

    Joined:
    5 Feb 2005
    Messages:
    337
    Thanks Received:
    42
    Country:
    United Kingdom
    Fair enough. Even the old black pipes in the background?
    Fwiw, he is gas safe registered (at least the van says so) although check it out tomorrow.
    Thanks for the heads up
     
  9. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    19,767
    Thanks Received:
    7,698
    Location:
    Lanarkshire
    Country:
    United Kingdom
    will be Malleable iron or steel, wont be cast
     
  10. JimCrow

    JimCrow

    Joined:
    31 Jan 2011
    Messages:
    617
    Thanks Received:
    207
    Location:
    St. Kilda
    Country:
    United Kingdom
    Not cast iron as such, but malleable iron pipe fittings are cast iron fittings,

    Malleable cast iron fittings.PNG
     
  11. Gasguru

    Gasguru

    Joined:
    9 Sep 2005
    Messages:
    11,758
    Thanks Received:
    3,073
    Location:
    Sussex
    Country:
    United Kingdom
    There's nothing wrong with any of that pipework and it looks as though the outlet pipework is actually giving support to the gas meter (the bracket is probably not screwed to the floor). Unless the meter bracket is fixed a copper outlet pipework will give less support.
    If you had some old lead composite pipework then I would advise replacement but not for MI.
    In fact many countries ban copper due to it's propensity to react with the gas and cause copper sulphide...that blocks gas valves. Happens here from time to time.
     
    • Thanks Thanks x 1
Loading...

Share This Page