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Discuss Legislation affecting solar thermal in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. Ric2013

    Ric2013 Plumber

    Given that solar thermal is an uncontrolled heat source, does one have to have any specific qualification to flush and refill a thermal system if the system is heating an open-vented (gravity) hot water system?

    For clarification, the primary solar water is a sealed system, but the secondary hot water is open-vented.

    Reason I ask is I have a customer wants the sludgy rubbishy water replaced by fresh water and solar transfer fluid. Flushing solar out seems relatively straightforward from a plumbing perspective, but I just wondered if there is are any legislative issues I need to consider?

    Thanks gents!
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

  3. Ric2013

    Ric2013 Plumber

    Seems to be a good course, but not sure it's relevant to a flush and refill situation as there's nothing about maintenance that I can see on the content, and I don't necessarily need to know how to design a system to service one. I suppose I'm strictly asking about the law rather than what would be ideal.

    Have you any link that discusses the law specifically?

    It has occurred to me that this is a sealed system, but then so are most heating systems and you don't need any qualification to flush and refill those.

    Obviously I'd need to know what I'm doing, but my feeling is flush as per chemical manufacturer's instructions, add R100 or S1 to manufacturer's instructions, circulate with a pump to get all the air out and I don't think I'd be far wrong.

    If I knew a good local solar installer, this is something I'd hand over to them, but customer says only person they can find is from Anglesey, and the company that originally installed this system wasn't interested in solar, just in it for the money and jumping on the bandwagon, (later fined for misselling IIRC), and now gone.

    Obviously the course would be a long-term goal anyway and would help me suggest improvements to the existing design which, as an unqualified person as far as regards solar, I would not be able to do. But I can't do the course without the prerequisites anyway.
  4. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Yes you are supposed to be qualified, I was , but wont renew it . The main problem you have is getting hold of a filling machine .
  5. bogrodder

    bogrodder Plumber GSR

    As far as I’m aware, there is no official qualification you need to fit thermal solar... there is no legal requirement. It’s more a training excercise with a fancy bit of paper at the end. I’ll stand corrected if anyone shows me a bit of real legislation that requires a qualification.
  6. Ric2013

    Ric2013 Plumber

    I'm trying to work out whether a power flushing machine is much different. Obviously you'd have to pressurise separately if you use the 'wrong' machine and perhaps a powerflush pump is more powerful. Will have to check the specs to see if this is even remotely feasible.
  7. quality

    quality Plumber GSR

    Ive done a bit of solar but made my own machine for that exact reason
  8. Ric2013

    Ric2013 Plumber

    Why won't you renew the qualification? So what qualification should the customer be looking for in someone who wants to service the system?
  9. bogrodder

    bogrodder Plumber GSR

    I had a filling station, but sold it on after installs dropped off after the renewable explosion 10 years ago. If I go to service a thermal solar install, I just use a modified garden sprayer pump. Easily get up to 2 bar with that;)
  10. Brambles

    Brambles Active Member

    I am not aware of any legislation that prevents anyone working on the primary system of wet solar systems - other than any part that may be covered by G3 legislation.

    However, they (wet solar) can be difficult systems to reestablish a balanced PH after flushing. PH should be 7 Sometimes the original system has been filled with deionised water to achieve this

    As Towfanjon as indicated you really need to have the correct pump set up, to achieve the above
    Last edited: Jul 1, 2019
  11. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Cheers for the heads up on that pal , my fluid wants changing.
  12. Ric2013

    Ric2013 Plumber

    PH should be 0. Do you mean 7? I assume you mean you need the pump to make getting the correct quantity of solar fluid to water ratio easy?
  13. bogrodder

    bogrodder Plumber GSR

    Piece of 10mm copper shoved into the sprayer hose and jubilee clipped on, then the world is your oyster regards how you final terminate it.
    • Like Like x 1
  14. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    No real demand Ric , mine was the bpec one , I am still pretty sure you have to have the qual , can you imagine fitting a system without being qualified and it goes **** up .
  15. bogrodder

    bogrodder Plumber GSR

    Why, premix it or buy ready to use fluid.
    • Agree Agree x 1