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Discuss Pipe work for cold supply to shed in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Sweegy

    Sweegy New Member

    Hi all could do with bit of advice I'm quoting on a cold water supply. to shed from house the customer wants plastic pipe I'm quoting mdpe 20mm is this suitable if so what depth does it need to be laid and does it need insulating and finally where it comes up from ground outside house wall is it ok to be used over ground then through obsolete tumble dryer ducting into house thanks
     
  2. rpm

    rpm Trusted Plumber Top Contributor!!

    There is a minimum and maximum depth but can`t for the life of me remember the numbers, sure somebody else will.
     
  3. moonlight

    moonlight Plumber GSR Top Contributor!!

    Your pipe should be laid in a trench at a depth of at least 750mm but no more than 1350mm. The pipe must be protected from stones, either bedded in fine sand or laid in suitable ducting. The pipe should be 25mm and of an approved material.
     
    • Like Like x 2
    • Funny Funny x 1
  4. Sweegy

    Sweegy New Member

    Thanks for reply can the pipe be used over ground
     
  5. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    20mm will be more than good enough for shed
     
  6. rpm

    rpm Trusted Plumber Top Contributor!!

    One persons shed is another persons 1 bed flat with full bathroom, kitchen sink and washing machine around here - Known as a bed in a shed for a 2 people.
     
  7. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!


    A famous C&G / NVQ exam question. Lol
     
    • Funny Funny x 1
  8. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    We only used to install 15mm coated soft copper into a normal house so 20 mm will be good enough

    Unless the house has its own 32mm mdpe supply
     
  9. Best

    Best Trusted Plumber Top Contributor!!

    I wouldn't want the mdpe pipe external at house. It isn't pretty for one thing.
    Would prefer to run it below floor into house, but if that is not possible - like if solid floor and risk to dpc, then need to have any external pipe that is above ground insulated and cased. Also quote for an isolating valve (stopcock or lever valve) to be fitted at connection in house. You might want to change over to 15mm plastic pipe for plumbing inside the shed, if much plumbing needed there, as it is easier to work with and less bulky
     
    Last edited: Apr 21, 2017
  10. Ch4 plumbing

    Ch4 plumbing Plumber GSR

    Blue MDPE isnt rated for use in areas exposedd to sunlight, you will need to use black MDPE for that as far as i know
     
    • Agree Agree x 3
  11. Sweegy

    Sweegy New Member

    Hi thanks for all replys just one other question will the pipe inside house need a double check valve fitted thanks again
     
  12. moonlight

    moonlight Plumber GSR Top Contributor!!

    What's going to happen to it when it reaches the shed?
     
  13. Sweegy

    Sweegy New Member

    The cold feed will enter shed through side wall having been insulated with armaflex inside and out then have a service valve and drain off fitted this is all the customer wants at moment
     
  14. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    whats it supplying tho, you need to know
     
    • Agree Agree x 1
  15. lame plumber

    lame plumber Plumber GSR

    double check valve for supplies to garden shed etc are par for the course.
     
    • Agree Agree x 1
  16. Sweegy

    Sweegy New Member

    It's for a water heater
     
  17. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    What's the water heater supplying

    Pond, chemicals, car wash ????
     
  18. Sweegy

    Sweegy New Member

    It's for a dog grooming saloon ok
     
  19. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    I would class that as a fluid risk 5 can't be fed from mains water

    So your a non starter before you start

    Needs break tanks and backflow prevention
     
    • Like Like x 1
    • Agree Agree x 1
  20. Stigster

    Stigster Plumber

    Absolutely this!
     
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