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Discuss Running gas pipe under concrete slab in the Gas Safe Register Forum - Public Forum area at UKPlumbersForums.co.uk.

  1. Ian57

    Ian57 New Member

    Hi,

    I am wanting advice on what is permissible with regard running a gas pipe under the concrete slab of a garage.

    To give further info, we are building our own house with a integral garage, we propose to have the gas central heating boiler in the garage, towards the back, the gas meter will be semi concealed or is it semi submerged (I forget the term) outside at the front of the garage to one side away from the driveway. Although the house is almost constructed, the roof going on in the next weeks, we have not yet laid the concrete slab in the garage and we wonder if we could run the gas pipe in the hardcore before the slab in laid. We have a gas safe plumber ready to do all the plumbing and having discussed this with him, he is of the mind that he should bring the gas pipe from the meter through the wall into the garage and then run it up the wall, across (below) the ceiling and down to the boiler before going into the house for the hob etc. He has said he will check the regs on whether it can be run under the concrete slab but I haven't heard back from him yet.

    I was hoping that we could use the yellow MDPE pipe perhaps in a conduit/ducting under the slab, what do you think? Also if it is permissible should the conduit/duct be yellow?

    Thanks
    Ian
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Yes you can have a look at trac pipe

    Aslong as he follows the regs you will be fine and acceptable
     
  3. Ian57

    Ian57 New Member

    Wow that was a fast response, thank you.

    A further question or two :):

    I've now looked at the tracpipe, although more expensive than the MDPE pipe, if I'm not mistaken it can be run in the concrete slab as opposed to below and does not require a conduit?

    What size to use (22mm) in order to prevent the appliances impacting on each others consumption? I'm sure my plumber will have this info but it's always good to talk!

    Thank you once again
    Ian
     
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    If it was me I would run it under the slab in a sand bed

    And yes speak to your gas safe engy for this as it needs to be sized correctly
     
  5. Ian57

    Ian57 New Member

    Thanks for the advice Shaun

    Regards
    Ian
     
  6. scott_d

    scott_d Plumber GSR

    I would only bury if there is no other option
    If above ground is possible why create a potential future problem
     
    • Like Like x 1
  7. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    If done correctly don't see any future problems
     
    • Like Like x 1
  8. scott_d

    scott_d Plumber GSR

    True but I'm sure you will agree if you go to do some work at a property, a visible gas pipe is nicer to see than one that disappears into the unknown
     
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    TBH if I've installed it I leave a line diagram and a plan of where it runs so does both me
     
  10. king of pipes

    king of pipes Trusted Plumber GSR Top Contributor!!

    Run it under the slab and in track pipe i would sleeve it under there if it should ever get damaged it could be replaced
     
    • Winner Winner x 1
    • Optimistic Optimistic x 1
  11. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    would need to be ventilated tho bud
     
    • Agree Agree x 1
  12. firemant

    firemant Plumber GSR

    Why make life difficult? Suitably protected copper underfloor at the correct depth is fine.
    Unless I am very much mistaken, MDPE cannot be used in this application, certainly not without being in a metal sheath. Even if t was, I cant see it being any cheaper than copper, taking into account the transition fittings
     
  13. jtsplumbing

    jtsplumbing Plumber GSR

    advantage would be to use TracPipe, no joints under floor.
     
    • Like Like x 2
  14. dave.s1

    dave.s1 New Member

     
  15. FG28

    FG28 New Member

    Im not so sure they like it in the concrete ?
    Opening up a real can of regualation worms
    Can you not lay concrete then run into the screed ?
    Much simpler ?
    Or go with the gsr s idea ?
     
  16. king of pipes

    king of pipes Trusted Plumber GSR Top Contributor!!

    Here is a few examples from Tracpipe which may help cheers kop

    Screenshot_2017-09-10-12-30-49.png

    Screenshot_2017-09-10-12-30-37.png
     
  17. UA GAS

    UA GAS New Member

    Gas pipework must NOT be buried in concert slab, It must ONLY be in the screed!
    There must be at list 25mm of screed cover above pipe.
    GAS pipework shall be Sleeved: factory sheathed, or on site application of PVC wrapping tape or bituminous painting ( wrapping tape should have 50% overlap ).
    You welkom...
     
  18. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Thats only for copper
     
  19. UA GAS

    UA GAS New Member

    Gas pipework must NOT be buried in concert slab, It must ONLY be in the screed!
    There must be at list 25mm of screed cover above pipe.
    GAS pipework shall be Sleeved: factory sheathed, or on site application of PVC wrapping tape or bituminous painting ( wrapping tape should have 50% overlap ).
    You welkom...
     
  20. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I can copy and paste as well

    "Alternatively, pass plastic sheathed soft coiled copper through a larger tube that has been previously set into the base concrete or in a purpose made duct.Try to run vertical pipes in walls in ducts, with access if possible, never inside the cavity."
     
    • Like Like x 1
  21. UA GAS

    UA GAS New Member

    Check this. DSC_0001.JPG
     
  22. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Google igem installation of pipework and read that

    Let me guess you did a 6 week course ?
     
  23. Moffski72

    Moffski72 Moffski72 GSR

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