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upvc piping mods

Discussion in 'Plumbing and Central Heating' started by mrcrow, 24 May 2016.

  1. mrcrow

    mrcrow

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    [​IMG]1 by mrcrow_uk, on Flickr

    [​IMG]2 by mrcrow_uk, on Flickr

    [​IMG]3 by mrcrow_uk, on Flickr

    in my garage are two pipes for the laundry and are in grey upvc? plastic

    i want to cut into and extend the cold so i can fit a garden tap at the front of the garage so i dont have to drag the hose round the front from the tap at the back outside of the property

    this piping must be a bit old because i had my kitchen renewed and the "plastic" piping for that is white.

    i would like to convert the 90* bend to an equal tee and so run the new piping about 2-3m and end in a standard garden tap to take my click on hose reel system near the up and over door end.

    the cold tap for the washing machine seems to fit via an copper olive type compression fitting, and i have some spare compression bends i could use if possible

    the two laundry pipes are from piping near the central heating boiler and have isolating valves fitted to them so i can shut down the cold to do this job.

    cheers
    geof
     
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  3. dilalio

    dilalio

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    If your question is "can this be done" then the answer is 'yes'.
    The plastic pipe is not old because it is grey, it is just a different brand/system!
    Whether using compression or pushfit you will need to buy inserts for the pipe you have, to use at every connection - I.e you will need 3 inserts for a T and 2 for an elbow!
    I would also lag the pipework where it is at risk of freezing and also a lever valve inside to shut off supply to the outside tap for the winter months and you will also need to put in a non-return valve in the pipework to the outside tap to comply with water regs.
     
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  4. mrcrow

    mrcrow

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    thanks...i put a water tap in my old house and i will use the same one...it has a non return valve in it
    glad you reminded me about that
    what is that grey piping know as and can i use an olive to fit onto any brass compression fittings...which i have spare in my kit
    cheers
    geof
     
  5. denso13

    denso13

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    Yes, copper olive preferably and also the correct insert for the pipe.
     
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  6. dilalio

    dilalio

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    (y)
    Looks like poly pipe or hep.
    OP: does the plastic pipe have anything printed along it that would indicate the brand?
     
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  7. Aquaheat

    Aquaheat

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    That doesn't comply with water regs. The double check valve is required to be internal

    Jon
     
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  8. mrcrow

    mrcrow

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    [​IMG]
    Hose Union Bib Tap with Double Check Valve 1/2" DZR to BS 1010 part 2

    it will be this one from toolstation...is that ok?

    cheers
    geof
     
    Last edited: 25 May 2016
  9. Aquaheat

    Aquaheat

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    No, you are required to have a double check valve inside the property to comply with water regs.

    Jon
     
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  11. Aquaheat

    Aquaheat

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    @mrcrow Find attached the water regs for an outside tap. Note that the Double check valve is required to be internal to be protected against freezing and that insulation is not classed as a protection against freezing only a delay against freezing. The check valve should be in a heated part of the property or provision made to ensure that freezing cannot occur.

    Jon

    Outside Tap Water Regs 1999.jpg
     
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  12. mrcrow

    mrcrow

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    yes here we are...
    [​IMG]P44 by mrcrow_uk, on Flickr

    and thanks for your help

    cheers
    geof
     
  13. dilalio

    dilalio

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    In practice Jon, I agree with your post above, but to be fair, the WRAS website states the following...

    image.png
     
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  14. mrcrow

    mrcrow

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    that is pretty clear
    the tap will be installed inside my garage...do you think it will be ok there in frost conditions?
    i can put a frost cover on it...otherwise...where should i fit the required double check valve...the source of the cold supply is from the central heating boiler in the cupboard where its situated...and also used as a airing cupboard...there is an isolation valve there so i could cut into the pipe at that area and it would certainly not ever freeze
    the rest of the pipework is all inside the garage which is attached to the house and fairly cool but has never shown signs of freezing
    cheers
    geof
     
  15. dilalio

    dilalio

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    Ok, polyplumb. So you need these...
    https://www.google.co.uk/search?q=polyplumb+pipe+inserts&ie=UTF-8&oe=UTF-8&hl=en-gb&client=safari
     
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  16. mrcrow

    mrcrow

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    ACE!!
    very pragmatic
    will now have a sort out of my spare compression fittings left over from past copper run jobs
    i see fitting a T in place of a polyplumb 90* bend involves cutting back the piping which wont work as the existing pipework is pretty tight on that run...guess i will just cut in on the straight run a bit along..watching the K's...will need to get a pipe cutter...and fit a T and then use 2 90* to get the new run to the front of the garage and drop a leg to just above waist height to fit the wras valve...
    well pleased with your help
    cheers
    geof
     
  17. Aquaheat

    Aquaheat

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    And while I agree with that sentiment we aren't talking about an existing installation. This is to be a new install to the front of the house.

    Jon
     
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