Drayton TRV4

Discussion in 'Plumbing and Central Heating' started by Dylan123, 19 Dec 2021.

  1. Dylan123

    Dylan123

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    Hi,

    I’m trying to drain and remove a radiator. One end is a Drayton TRV4x

    I’ve turned it as far as it will go. It has a frost setting and no further.

    this hasn’t isolated the rad. When I pull it out the valve water shoots out.

    how does one go about isolating from this valve as I can’t seem to do this

    thanks
     
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  3. RandomGrinch

    RandomGrinch

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    Hi,

    Something doesn't seem right with the valve! It probably should be shut off at the frost setting (unless your house is freezing!).

    Do you by any chance have a cap like this lying around?

    Screenshot_20211219-125853_Chrome.jpg

    it would have come with the valve originally, and should provide a positive stop to the valve (with the head removed).
     
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  4. Mottie

    Mottie

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    What I've done with mine was to put it on max, remove the head, unscrew the bolt that connects to the valve (count the turns so that it can be put back to where it was) as much as you can before it comes out, refit the head and close it off then.
     
  5. lightning

    lightning

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    You have turned off the lock shield valve as well .
    Make sure pin is not stuck open in Trv
     
  6. Ihavenojob

    Ihavenojob

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    Try sticking a 5p coin between the head and the valve, after checking what lightning suggests about the lockshield.
     
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  7. Dylan123

    Dylan123

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    This is all a bit technical the YouTube video said just turn the valve off.

    I got no idea how to do the above!

    How do I get the twisty thing off the valve, is that what you mean?

    out of my depth a bit.

    Also, I have a combi system. I’ve lost about 1 litre. Do I need to do anything other than let w little more water in and bleed the rad when it’s back on?

    I got a plumber coming Thursday so he might be able to show me how to do it

    I have a multi tool and will try to just hack the skirting board out without moving the rad.

    extremely annoyed this couldn’t be straightforward after following the steps properly!
     
  8. BlueLoo

    BlueLoo

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    Remove the head and use a zip tie across the pin. You might need to use a widget on the pin to keep the tie in place.

    Once tight, try again. If it still leaks, the valve is toast.
     
  9. BlueLoo

    BlueLoo

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    If you don't know how to remove a trv head and find the videos too much, leave this for the plumber.

    You need a little bit of DIYabillity to remove a rad and not create havoc in your house....
     
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  11. Dylan123

    Dylan123

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    I tried pulling the head off but it doesn’t move. Are you saying under the head there’s just a valve like the other side and I can just turn it shut manually?

    The valve is brand new
     
  12. Dylan123

    Dylan123

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    I just don’t understand the terminology, I followed it perfectly, I just don’t know how to get the trv off.

    I have to learn this as it’s not difficult I’m
    Sure and determined to do it!
     
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  13. BlueLoo

    BlueLoo

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    Go and watch YouTube re: trv videos.
    You have a head and a body.
    The head is simply attached to the body via a screwed collar.

    The body is integral to the plumbing.

    You should be able to simply unscrew the collar by hand. If its tight, use a rag for grip.

    Lefty loosly, righty tighty....
     
  14. BlueLoo

    BlueLoo

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  15. Dereekoo

    Dereekoo

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    And whist you about it check and make sure the valve/collar was properly located and tightened up as this may have stopped the valve closing the water off completely in the 1st case
     
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  16. Dylan123

    Dylan123

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    Thank you:

    so all I have to do:

    remove the trv as shown

    Manually turn the valve clockwise till it is shut (I have done this already with the other end)

    Then drain radiator down bleeding it in the process.

    simple as that?
     
  17. Dylan123

    Dylan123

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    One other question, I have a combi system, I lost probably 2 litres from the heating, I had air locks when this happened with the previous tank system.

    am I fine just turning it back on?

    I think it’s a closed system
     
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