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Valliant combi pressure

Discussion in 'Plumbing and Central Heating' started by opps, 11 Jul 2021.

  1. opps

    opps

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    Hi all.

    Whilst at a customer's home yesterday, she asked me to top up the combi pressure. It didn't actually need topping up at that point in time but it does drop too low about 4(?) times a year. I topped it up to the halfway mark. She asked me to top it up to three quarters. I advised her against it but, anywho... The odd thing was that it didn't actually increase at all. It just stayed at the halfway mark.

    Admittedly, when I got there I discovered that one valve was open and the other closed. For the life of me I couldn't remember if they close clockwise or anticlockwise. So I left them as I found them.

    I believe that the valves should be perpendicular to the pipe when closed and that you turn them anticlockwise to open them.

    I am back on site tomorrow afternoon.

    Is there a reason why the pressure wouldn't increase past the halfway? When I topped it up to half, the inrush of water was barely audible even though both valves were fully open.
     
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  3. picasso

    picasso

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    What does "half way " mean ? if there are no numbers on the gauge its probably the newer model and half way could be way over pressurised.
     
  4. oldbuffer

    oldbuffer

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    And don't forget they will never exceed the pressure of the incoming mains.
     
  5. CBW

    CBW

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    Was the loop definitely attached?
     
  6. opps

    opps

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    Here is an image of the pressure gauge after I topped it up.

    boilerprssure.jpg
     
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  8. opps

    opps

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    It is inbuilt.


    By halfway, I meant that it is halfway between the minimum and maximum recommended pressure.

    One reflection I should have mentioned that it is an ecotech plus 381- apologies.
     
  9. Madrab

    Madrab

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    That's plenty of pressure
     
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  10. opps

    opps

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    That is what I told her. I just don't understand why it wouldn't go any higher. Perhaps the water pressure there is pants.
     
  11. Madrab

    Madrab

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    Yup, that's probably sitting at the upper 1 bar so it may be just that the mains pressure isn't the best, wouldn't worry about it.
     
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  12. opps

    opps

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    Cheers, much appreciated.
     
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