Is this vented or unvented water cylinder?

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  • edited 30 November 2020 at 11:36AM
    grumblergrumbler Forumite
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    edited 30 November 2020 at 11:36AM
    I thought this can't be an unvented one. They normally have an expansion tank, right?
    No, they are sealed and under mains pressure. They have an expansion vessel with compressed air.


    We are born naked, wet and hungry...Then things get worse. :(

    .withdrawal, NOT withdrawel ..bear with me, NOT bare with me
    .definitely, NOT definately ......separate, NOT seperate
    should have, NOT should of
    .....guaranteed, NOT guarenteed
  • edited 30 November 2020 at 11:36AM
    grumblergrumbler Forumite
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    edited 30 November 2020 at 11:36AM
    Any tips on how to find which taps are mains?
    Mains valve is for the loft tank only. It can be near the tank or in some other place.
    https://www.plumberparts.co.uk/advice/hot-water-tanks/open-vented-hot-water-cylinders

    We are born naked, wet and hungry...Then things get worse. :(

    .withdrawal, NOT withdrawel ..bear with me, NOT bare with me
    .definitely, NOT definately ......separate, NOT seperate
    should have, NOT should of
    .....guaranteed, NOT guarenteed
  • grumbler said:
    Any tips on how to find which taps are mains?
    Mains valve is for the loft tank only. It can be near the tank or in some other place.
    https://www.plumberparts.co.uk/advice/hot-water-tanks/open-vented-hot-water-cylinders

    Sorry, I phrased the question badly. What I mean is, how do I find out which taps are fed directly by the mains supply? The previous owner said that all cold water is from mains but I am a bit sceptical.

    Thank you

  • nofoollikeoldnofoollikeold Forumite
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    1. Find the main stop valve for the property.
    2. Turn it off.
    3. Open each cold tap in turn.  Allow any residual water to flush out (10 seconds).  If water continues to flow at a decent pace, then tank fed, otherwise mains.
    4. Repeat for WC's to see if mains or tank fed.
    5. Turn water back on.
  • edited 30 November 2020 at 4:37PM
    grumblergrumbler Forumite
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    edited 30 November 2020 at 4:37PM
    Typically, mains water is in the kitchen, supplies the big tank in the loft, small expansion tank for heating and an electric shower if you have it.
    We are born naked, wet and hungry...Then things get worse. :(

    .withdrawal, NOT withdrawel ..bear with me, NOT bare with me
    .definitely, NOT definately ......separate, NOT seperate
    should have, NOT should of
    .....guaranteed, NOT guarenteed
  • EssexExileEssexExile Forumite
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    Usually mains is stopped by a stopcock, non-mains pressure is stopped by a gate valve. Google those terms to see the difference.
    Tall, dark & handsome. Well two out of three ain't bad.
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