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Discuss 28mm copper pipe instalation?? Commercial plumbing in the Commercial Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Ecoplumbing

    Ecoplumbing New Member

    Can anyone help??!!!
    Been asked to carry out a cold water mains installation to serve a fire hose from an existing copper pipe in a factory. The pipework will need to run 16m horizontally then drop 8m vertically. The pipe will be 28mm copper. my issue is will this length of pipework be affected with expansion, ie does it matter if compression fittings are used?
    Also what is the best way of clamping the pipe to a steel support beam ?
  2. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    is the fire hose on a separate fire circuit ? or is it just on the water main?
  3. Chalked

    Chalked Plumber GSR

    Why compression????
    Solder fittings much more reliable. Or hire a copper press fit gun and do it in press fit. Would be cheaper than compression. Even adding in the hire cost.
  4. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    im guessing no hot works
  5. Ecoplumbing

    Ecoplumbing New Member

    It's mains fed as far as I'm aware
  6. Ecoplumbing

    Ecoplumbing New Member

    It's in a paper mill, hot works can be done but there'll be a lot of risk assessments to fill in!
  7. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    right couple of pointers

    get approval from the water supplier / board first as sometimes they class fire reels as cat 5

    but what are you doing about backflow prevention ? if its class as 3/4

    i wouldn't worry about expansion at that length its not going to be much 25mm at most (more like 10mm)

    you have a few options depending on what steel beam you have

    M10 Vertical Flange (1-5mm) Threaded Rod Hanger

    Flange Clamps Lindapter & BTS

    Heavy Duty Beam Clamp ( Pair)

    25-30mm Surefix XL Rubber Lined Pipe Clamp -

    i would press fit tbh

    geberit 28mm press fit fittings

    Copper | Pipekit

    and you can hire the tool for about £150 a week (£ 40 a day) roughly
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  8. Ecoplumbing

    Ecoplumbing New Member

  9. Ecoplumbing

    Ecoplumbing New Member

    Thanks. I'll look into it. I was going to put a double check valve on as close to the hose as possible. Press fit sounds like a good option , I've not done much commercial work before and certainly not installed a 16m run so was unsure about the expansion. Think that's helped me out a lot anyway
  10. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    double check would be ok if the water board classed it as cat 3

    cat 4 would need a rpz valve

    or 5 a break tank

    tbh i think they would class it as cat 4

    but what ever they decide get it in writing
  11. Ecoplumbing

    Ecoplumbing New Member

    There's 3 other hoses already on the system that have check valves on so was just going to copy those. I'll definitely look into what cat they are though so nothing comes back on me. Thanks again
  12. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    fair enough there not on there own circuit are they ?

    also dont forget to lag it

    either foil insulation or armaflex

    Armaflex Insulation, Knauf Pipe Insulation and Rockwool Pipe Lagging PipeLagging.com
  13. Ecoplumbing

    Ecoplumbing New Member

    No, they're all on the same system, the customer just wants another hose connection adding to it . Definitely be lagging it though
  14. Gareth Harris

    Gareth Harris New Member

    Don't just copy what's there as you may fall foul as pointed out by @ShaunCorbs@ShaunCorbs

    Another good point raised is that this work needs to be notified to the Water Supplier, and they will also assist in identifying the correct backflow prevention to install.

    You also need to consider stagnation in the pipe to the shower hose, so may also require a single check valve where it tees off the main.

    good luck!
  15. Ecoplumbing

    Ecoplumbing New Member

    I'm still awaiting for the job to be accepted so I'll definitely be in touch with the water board if I get the job . Thanks for all your advice
  16. Gareth Harris

    Gareth Harris New Member

    No Problem. You need to speak to the Water Regs department. as you haven't stated who the water supplier is contact details for all can be found here: WRAS Water Company Contacts

    Better to do it once and get it right than have to go back!
  17. Ecoplumbing

    Ecoplumbing New Member

    Yes, I don't fancy going back once it's done . Most of the pipework is suspended 8m high so I don't fancy paying for access twice !