Boiler Elbow Leaking

Discussion in 'Plumbers' Talk' started by Alwaysworking, Aug 11, 2018.

  1. Alwaysworking

    Alwaysworking Member

    I've got a leaking elbow on a boiler, I've Tweaked the nut but hasn't stopped. Looks like a normal 15mm elbow are they standard on boilers?

    Attached Files:

  2. just pumps

    just pumps Active Member

    Ask yourself what makes the watertight seal on a compression fitting.
  3. Lashings of PTFE tape on the thread I believe.
  4. just pumps

    just pumps Active Member

  5. Cwt

    Cwt New Member

    Diy'ers wrap PTFE around threads, it's the olive that makes the seal so wrap it around that.
    Hard to tell from pic but other connection on that elbow will be a fibre washer which may need replacing
    blarblarblarblar and just pumps like this.
  6. kiaora

    kiaora Well-Known Member

    It’s definitely a case of look twice and repair once, leaks have a habit of dripping from the low point! Think about it,

    Any leak above will drip down !

  7. diymostthings

    diymostthings Well-Known Member

    There is a case for wrapping PTFE around the threads - (i) it is a lubricant (ii) because of this it allows the compression nut to be tightened smoothly instead of juddering and possibly resulting in an under/over tightened joint if you end tightening at the end of a judder.
  8. just pumps

    just pumps Active Member

    If it is juddering then use decent quality fittings! ;)
    Cwt likes this.
  9. blarblarblarblar

    blarblarblarblar Active Member

    Thanks guys, replaced the fibre washer and sorted....
  10. Cwt

    Cwt New Member

    Whenever I see PTFE on compression fitting threads it rings the diy/ homeowner alarm bell.
    rogerk101 and just pumps like this.
  11. Dennisplamer

    Dennisplamer New Member

    You can apply soldering flux around the whole joint and apply heat until the old solder melts. If the leak still continue then cut out the entire elbow then solder in new fittings.
  12. just pumps

    just pumps Active Member

    Err, it`s fixed Dennis (post#9).

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