Compression joint leaking!

Discussion in 'Plumbing and Central Heating' started by jackecole, 7 Apr 2013.

  1. jackecole

    jackecole

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    Just a quick question, I've made many compression joints over the last few years, but having made a few this weekend, 1 of them is seeping, a few drips per day. I used a copper olive, and some boss white on a 22mm copper pipe! It seems crazy. Anyone had this before?
     
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  3. xr4x4

    xr4x4

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    Yes, put some more goo on the oilve and retighten.
     
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  4. Agile

    Agile

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    I would lubricate the olive and screw thread with silicone grease. That lubricates the olive and thread and applies more pressure to the olive. That always works for me.

    I dont encourage applying joint sealing paste as that makes it difficult to dismantle.

    But winding 5-6 turns of PTFE tape will also seal it an ddoes not affect taking it apart.

    Tony
     
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  5. jackecole

    jackecole

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    Thanks for your help :) I usually use boss white, but to be honest my boss white is "hardening"! so time for a new tub. I have found that brass olives are poor compared to copper ones that seem to compress better!
     
  6. Agile

    Agile

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    Brass olives are far cheaper to make than soft copper!

    But I would still like you to stop using joint paste, its not only unecessary but makes ti a right pig to take apart!

    There is always a possibility that one day I might have to work on your joints!

    Tony
     
  7. xr4x4

    xr4x4

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    I always use a little plumbers mait on the olive, non potable of course.

    Always works for me, easy to take apart.
     
  8. gaspro1981

    gaspro1981

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    Every proper/competent plumber uses a suitable jointing compound on px fittings :rolleyes:
     
  9. bolshy

    bolshy

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    I use jointing compound on olives, it generally ensures a leak free union first time. In my experience, the olive can still be removed years later if necessary, because it hasn't been over tightened and compressed into the pipe.
    IMO, half the problem lies in the fact that most imported olives have little or no quality control as they arrive by the container load, and compared to the old ones made in Blighty.......little comparable weight or substance.
     
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  11. Agile

    Agile

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    If using a copper olive then no jointing compound should be needed!

    Nor should brass olives but their composition is so cheap now that they are too hard to give a good seal in all cases. I still dont use any compound on them apart from silicone to lubricate them!

    Tony
     
  12. Agile

    Agile

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    Applications and Uses

    Conex Compression fittings are especially advantageous in retrofit plumbing schemes, where space is confined and/or the use of heat must be avoided. They are available in 6-108mm and are suitable for connecting tubes in accordance with EN 1057 and many other standards including ISO 274.

    Conex unique ribbed capnuts are supplied in 15-28mm. Sizes 6-12 and 35-54mm are supplied with octagonal capnuts. Fittings in 66.7-108mm incorporate loose compression plates, where tightening is through six 3/8" BSW nuts and allthreads. PTFE tape is not required for the installation process.
     
  13. mickyg

    mickyg

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    who said anything about ptfe you nutter :LOL:

    I use jet blue, never had a problem taking it apart. You need to grow some :LOL:

    op, dismantle and clean you may have some swarf or some debris in there.
     
  14. Onetap

    Onetap

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    Usually true, because the copper olives are soft annealed and should form a seal on their own. If you have to undo the joint, the olive will be work hardened. If you don't want to replace the olive jointing compound or PTFE tape will seal it.
     
  15. Agile

    Agile

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    I did not write that ( as such )! Its from the Conex site and their advice for using their compression fittings.

    Strangely, so many others here think they know better than the manufacturers!

    I dont, but thats based on my personal experience!

    Tony
     
  16. mickyg

    mickyg

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    so what do you think everyone else bases their advice on? hearsay?
     
  17. Agile

    Agile

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    Generally, I would expect people to follow the manufacturer's recomendations!
     
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