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Discuss Unvented composite valve (reliance) query? in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. macka09

    macka09 Plumber GSR

    Hi all. I seen an install today of a direct unvented cylinder which looked odd and just wanted some advice on it please. On a composite valve am I right in thinking, there’s a 22mm cold inlet, 2 balanced cold outlets and a prv??
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    expansion vessel port normally after the balanced
     
  3. macka09

    macka09 Plumber GSR

    I thought that was the case but I’m being assured that the 22mm connection on the side can be used for a balanced cold as well as a balanced cold out the bottom of the valve??
     
  4. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Never have two balances, if it got the plastic plug in it thats for the ex vessel , could do with a pic or manufacturer
     
  5. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    it could be but no scv in the end so would require one
     
  6. macka09

    macka09 Plumber GSR

    That’s the set up guys!

    89283EED-4D92-41DA-95E6-60C6DD040CEB.png
     
  7. Karl

    Karl Member

    Balanced cold only any good before the check valve, if you blow back through the valve (opposite direction of flow) the port your getting air through is for the expansion vessel and the other will be for balanced cold
    upload_2018-8-9_22-15-24.png

    upload_2018-8-9_22-15-24.jpeg
     
    • Agree Agree x 1
  8. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

  9. macka09

    macka09 Plumber GSR

    It goes off to a kitchen and bathroom.
     
  10. macka09

    macka09 Plumber GSR

    This a different valve to what’s in the photo mate.
     
  11. Karl

    Karl Member

    I’m aware of that I was posting that whilst he posted picture so I didn’t see until after, anyway I was showing as an example they still work the same
     
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    meter inlets
     
    • Funny Funny x 1
  13. macka09

    macka09 Plumber GSR

    I don’t actually know tbh with you. I was concentrating on the vessel set up and the 2 balanced colds if I’m honest. Have any of you seen a combi valve with 2 balanced colds?
     
    • Like Like x 1
    Last edited: Aug 9, 2018
  14. scott_d

    scott_d Plumber GSR

    Balanced cold needs to be before the check valve or you could get hot water flowing back from the cylinder
     
  15. macka09

    macka09 Plumber GSR

    Single check valve ??
     
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