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Water and waste coming through plasterboard?

Discussion in 'Plumbing and Central Heating' started by robodelfy, 6 May 2020.

  1. robodelfy

    robodelfy

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    I'm running my water feeds for toilet and sink into the wall cavity. Then I plan to pop them out of the wall to connect. I will be using plastic push fit 15mm pipes inside the wall.

    What should I do when coming out of the wall. I guess I will need an isolating valve as soon as it comes through the plasterboard, then Flexi pipes to the Somme and toilet?

    But how do you secure these on the plasterboard so they don't move in and out? I was wondering if you can get some sort of grommet for plasterboard and 15mm pipe?

    Photo attached, purple lines show the general idea

    Thanks 20200506_155656.jpg
     
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  3. picasso

    picasso

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    Try not to put joins in inaccessible areas, couple of years down the line you will be smashing the lath and plaster trying to get to leaks, best practise is to have copper with bends in the wall and soldered joins on the outside of the wall BUT does anyone take any notice... do they f*** :D
     
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  4. robodelfy

    robodelfy

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    My plumber seems to think the speedfit stuff is reliable. I know it's not the same as a copper soldered joint, but I'm doing it myself for the first time! I did uncover some push fit stuff that must be 20 years old, and hasn't slipped or moved. I'll still replace it with new fittings just to be safe!

    But what about when coming out of the wall, did you see the last part of my question? This is the bit I need to work out

    Thanks
     
  5. picasso

    picasso

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    I normally put a baton between the uprights and then use pipe clips screwed baton to secure pipes.
     
  6. robodelfy

    robodelfy

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    And then just pop them through and out isolating valves one before going to sinks or toilet etc?
     
  7. picasso

    picasso

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    That's correct.
     
  8. HERTS P&D

    HERTS P&D

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    Rob, I have to ask, when you took your profile selfie, was there a fly flying above your head?

    Andy
     
  9. dilalio

    dilalio

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    Eh! You use one of these then...
    61+QbLVO2VL._SX425_.jpg

    :p:sneaky:(y)
     
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  11. dilalio

    dilalio

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    Bad squint.
     
  12. robodelfy

    robodelfy

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    That photo is very old! I have no idea. And my name isn't Rob, but everyone thinks it is because of the email address I made over 20 years ago :)
     
  13. durhamplumber

    durhamplumber

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    They are...But entirely different to saying They never leak.
     
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  14. durhamplumber

    durhamplumber

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    Even more important then that you do not cover joints.
     
  15. Madrab

    Madrab

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    If you are doing it yourself and you cant use copper and solder then push fit is the next best thing I guess. You just need to be very careful that the pipe is prepared properly (deburred/sharp edges removed) and a proper insert used if needed, before pushing into fitting.

    Also mark the pipe to ensure the pipe is fully inserted. If it's speedfit then always remember to screw the fitting closed.
     
  16. durhamplumber

    durhamplumber

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    I have seen more disasters with plastic than copper or brass fittings
     
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  17. Madrab

    Madrab

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    Couldn't agree more, always soldered copper wherever possible .... brass compression where it's hidden with no easy access .... personally I would avoid. One slight twist the wrong way then could be left with a leaking fitting where it can't be got at.

    Not sure if the OP is using copper or plastic tho.

    @robodelfy, when you then come out of the wall leave enough length so it can bend upwards before the valve and then add a pipe clip at that point then an ISO valve and then add another clip above it so you are clipping and supporting the valve and the pipe above and below.
     
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