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Discuss Minimum mains water flow rate in the Water Regulations area at

  1. Fitzthefool

    Fitzthefool Guest

    Hi all.

    Bumped into a guy who worked for a water supply company the other day and he mentioned that the supply company has a duty to be giving at least 10 litres per minute to a property. Is this true and if so is it true for all of the UK?

    regards, chris
  2. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    I think it varies pal, i think the pressure has to be a min of 1 bar as well
  3. noggin78

    noggin78 GSR

    The one bar rings a bell. I know you cant pump off the mains anymore than 12 l/min (without authority approval) so would be in that region.
  4. Ch4 plumbing

    Ch4 plumbing Plumber GSR

    It's not even that, I think it's 0.8bar but I might be wrong
  5. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    It is amazing how water pressure is so different all over the country for obvious reasons. You lads from the smoke wont sell many PRV's lol
  6. crush

    crush New Member

    1 bar and 10 lpm at the water undertakers boundary. not in your property

    generally speaking the boundary is at the undertakers outside stop cock
    • Like Like x 1
  7. Reg Man

    Reg Man Trusted Plumber GSR

    Oftec... minimum .7 bar at 9 litres/min...
    • Winner Winner x 1
  8. cr0ft

    cr0ft Trusted Plumber GSR

    The Guaranteed Standards Scheme published in 2008 by OFWAT. 0.7bar minimum pressure in the communication pipe. Nothing about flow rates that I can see in there though.

    It even mentions compensation amounts that Water suppliers have to pay in the event of low pressure!! I will be claiming £25 off my water bill tomorrow now :)

    Attached Files:

  9. crush

    crush New Member

    Just for clarification the compensation refers to DG3s which are points against the specific water company if your supply is unexpectedly interrupted for over 4 hrs.

    The water company I work for sets its minimum pressure and flow above that of water regulations that is why I quoted those figures earlier in this thread.
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