(Another) leaking rad valve question

Discussion in 'Plumbing and Central Heating' started by pmx_super, 6 Dec 2021.

  1. pmx_super

    pmx_super

    Joined:
    27 Oct 2003
    Messages:
    229
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi,

    I have a leaking rad valve on a radiator that will be torn out and replaced when I have building work done next year. So, I RTFF and found guidance on "packing the valve" with PTFE tape. However before I dive in and give this a go I have a few questions:

    1. My valves are twin-entry micro-bore ones (see pic). Does the PTFE trick even work on this type of valve (Leak 1)?

    2. When I undid the nut to test out the procedure I sprung a secondary leak around the nut itself (leak 2 in pic). I had to tighten it very aggressively to stop it dripping. Is this "normal" or should I do something else e.g. wrap the nut thread in PTFE / a bit of fernox?

    3. Can a leak be "too bad" for this fix to work? If open the valve even a half-turn it literally sprays out (it's a gravity fed system too, so not much pressure). I have to close the valve very aggressively (with pliers) to stop it dripping.

    Thanks
    James
     

    Attached Files:

  2. Sponsored Links
  3. Gasguru

    Gasguru

    Joined:
    9 Sep 2005
    Messages:
    12,657
    Thanks Received:
    3,398
    Location:
    Sussex
    Country:
    United Kingdom
    Few valves can be repacked to seal their spindles.
    It probably uses o rings in which case a new valve is required.
     
    • Thanks Thanks x 1
  4. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    23,975
    Thanks Received:
    10,079
    Location:
    Livingston
    Country:
    United Kingdom
    you would be well advised not to touch that valve, you are just asking for problems
     
    • Thanks Thanks x 2
  5. pmx_super

    pmx_super

    Joined:
    27 Oct 2003
    Messages:
    229
    Thanks Received:
    0
    Country:
    United Kingdom
    Thank you for saving me from myself. I can now happily get through winter with an electric heater.
     
    • Like Like x 1
  6. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    23,975
    Thanks Received:
    10,079
    Location:
    Livingston
    Country:
    United Kingdom
  7. bhm1712

    bhm1712

    Joined:
    7 Jan 2009
    Messages:
    1,556
    Thanks Received:
    69
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    When you undo that nut, you will spring a leak at leak point 2 and 1 unless the system is empty.

    i successfully applied ptfe tape to the threads on the stuffing gland on the twin entry valves at my old house but did it with the system empty of course. This lasted me until I replaced the valves with conventional types about 2 years later. However as there are literally no spares available for these I’d leave well alone now since you’re replacing next year unless the leak is bad and can’t be managed.
     
  8. Sponsored Links
Loading...

Share This Page