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Discuss Primatic cylinder or not in the Central Heating Forum area at UKPlumbersForums.co.uk.

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  1. Topher

    Topher New Member

    Hi
    I have a system boiler downstairs, cylinder tank upstairs in the bathroom with two feeds on side, one feed the other side and one on top
    One of the feeds comes from a diverter valve for either hot water, heating or both
    In the attic, there's a single tank

    Is anyone able to say from that if the cylinder is prismatic?
    Not sure if the diverter valve means its not
    Having HW pressure trouble with a new mixer shower but not sure if I can use a pump or not

    (images attached)

    Thanks
    Chris

    IMG_20181007_220906.jpg

    IMG_20181007_220857.jpg

    IMG_20181007_220916.jpg
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I wouldn't say so

    Do you have to tanks in the loft ?
     
  3. Topher

    Topher New Member

    No just the one tank
     
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Big tank ?

    What boiler have you got pic ??
     
  5. Topher

    Topher New Member

    Not sure if it's big, would have to check
    What's classed as big?

    Pics of boiler should be in my post (hopefully)
     
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Bigger than 1 foot square

    Just cylinder in the pics could be a back boiler eg fire or a standard boiler ?
     
  7. Topher

    Topher New Member

    Sorry meant cylinder pics in post, and realised you said boiler... It's late lol

    I believe it was a back boiler at some point, but at was replaced with a standard boiler (system, not combi)

    Does big tank mean prismatic or small tank?
     
  8. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Ok could be a sealed system that would explain only one tank other than a pri system
     
  9. Topher

    Topher New Member

    I'm not aware of any expansion vessel in the house, just the plastic tank in the attic
    Would a sealed system have to have one?
     
  10. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Could be in the boiler need a pic of the boiler to confirm
     
  11. SimonG

    SimonG Trusted Plumber Top Contributor!!

    Would have said sealed system due to what looks like the old feed and vent hacksawed through to the left of the cylinder.
     
  12. sammathias

    sammathias Plumber GSR

    A
    Nd they left all the scrap copper but took out the f+e tank .

    Would need a picture of the boiler yes but could well be a primatic cylinder.
     
  13. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Looks like some posts have gone dans been playing again baisi sealed boiler
     
    • Like Like x 2
  14. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Sure I posted on here also. Ohhh welll
     
  15. dan_the_plumber

    dan_the_plumber GSR

    Yeah single cistern means it’s either a direct cylinder. But because of its age and the mid-position valve, it’s far more likely to be primatic.
    Whatever you do, do not add inhibitor or cleaner to these systems.
     
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