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Moving incoming water main for extension

Discussion in 'Plumbing and Central Heating' started by Stephent1234, 10 Apr 2021.

  1. Stephent1234

    Stephent1234

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    We are in the throws of starting an extension project. The existing sink is on the rear wall that will be removed and the water main is below it.

    We want to open the room up, so ideally the kitchen sink will be moved approx 2m.
    This leaves us with a problem, which is the incoming main. Can we just channel to the new location, extend the pipe and conc over?
     
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  3. muggles

    muggles

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    You can do, but depending on what you have now it might be worth taking the opportunity to upgrade it. Do you know what size/material it is currently?
     
  4. Stephent1234

    Stephent1234

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    Not at the moment, as we get the keys next week. It's an 80s house so won't be lead and shouldn't need upgrading.

    I'm assuming it's plastic.
     
  5. muggles

    muggles

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    Might still only be 20mm or old half inch and an upgrade to 25mm may be advantageous
     
  6. Stephent1234

    Stephent1234

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    We are moving off topic now. I'm not upgrading the main, as the work will outweigh the benefits. I'm not proposing to change the position it comes in through the slab.

    Any advice on altering the position would be great.
     
  7. wundaboy

    wundaboy

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    You should locate where it comes in from outside and joint there. I wouldn't be happy having a plastic pipe joint buried in an internal concrete floor.
     
  8. oldbutnotdead

    oldbutnotdead

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    Yeah that. Also run the new bit in 25mm (whatever size the existing is), if you decide in the future to upgrade the supply it'll be easier & give better results
     
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  9. Stephent1234

    Stephent1234

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    I'm hoping that it comes in at the corner of the house, which would be ideal. It only needs to move approx 1m max, so a new supply from outside simply is not happening.
    I'd rather an accessible shallow trench covered over with some ply, then vinyl planks.
     
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  11. oldbutnotdead

    oldbutnotdead

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    That would do- main thing is to not bury the coupler such that getting to it in the future would be massively disruptive. Mechanical connections have movable parts, movable parts are a failure point
     
  12. Notch7

    Notch7

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    Rude.
     
  13. Stephent1234

    Stephent1234

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    It's not rude. I appreciate the help, but it was going off topic and talking about upgrading the pipework, which isn't what I have asked.
     
  14. Stephent1234

    Stephent1234

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    That's exactly what I was thinking.

    If we use vinyl planks as well, they are fairly simple to lift and put back.

    I'm trying to see if there is a neat inspection cover or something, but can't seem to find anything.
     
  15. oldbutnotdead

    oldbutnotdead

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    Have a google for in floor utility box- there are a few there (just cut the bottom out). TBH with your vinyl plank flooring the ply lid set into the concrete will work just as well, not as if you'll be lifting it weekly :)
     
  16. Stephent1234

    Stephent1234

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    Yea I think you are right. Just make sure I remember exactly where it is and check it every year just to be sure. It should be absolutely fine though, especially we use robust fittings. In reality, it will probably never leak!

    It's no different to the joint from the main and the stop tap, albeit its half hidden.
     
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  17. oldbutnotdead

    oldbutnotdead

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    Make sure when you cast the hole that its big enough to allow you to replace the connector if necessary (so enough length to pop pipes in/out & enough width to get a decent sized set of grips on the thing. Yeah MDPE couplers are pretty good, last set i bought had some sort of ratchet latch on the nuts to prevent them coming loose
     
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