Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Plumbing (https://www.askmehelpdesk.com/forumdisplay.php?f=259)
-   -   What is the best way to stop compression valve leak? (https://www.askmehelpdesk.com/showthread.php?t=299956)

  • Jan 6, 2009, 01:12 PM
    Infodoc
    What is the best way to stop compression valve leak?
    What is the best way to stop a leak from a newly replaced water compression value with a new ferrule, etc? I have a small leak coming from the back of the bolt that screws into the valve. Is it possible that the end of the copper pipe was not flushed against the valve to get a tight fit even if teflon tape as used?

    Thanks,
    Infodoc
  • Jan 6, 2009, 07:38 PM
    andrewc24301

    Tighten 'er up!

    If that don't work, then it's possible you may need to take the assembly apart and put a new ferrule on, it's possible there could be a burr, or a minor inperfection with the pipe causing this issue. Also check the water valve connection (what the nut screws on to) make sure there is no burrs or debries that would cause an inpefect seal.

    If it's the pipe, just cut off the bad section and try again.

    If you are using any teflon tape or dope to make a seal, clean that stuff off there, compression fittings need no teflon. It's just a metal on metal seal.
  • Jan 6, 2009, 07:42 PM
    KISS

    No teflon tape with compression fittings.

    You can pull the old ferrule off and use a new one with a special puller.
  • Jan 6, 2009, 07:46 PM
    andrewc24301
    Quote:

    Originally Posted by KeepItSimpleStupid View Post
    No teflon tape with compression fittings.

    You can pull the old ferrule off and use a new one with a special puller.

    I'd like to know more about this puller, I've run into a lot of situations with stubborn ferrules, especially those that have been on for years, for some reason gas fittings are the worst. In fact, the boss and I were fighting one today, finally just had to cut it off...
  • Jan 6, 2009, 08:50 PM
    afaroo
    1 Attachment(s)

    See the picture below for the puller, Thanks.

    John
  • Jan 6, 2009, 09:28 PM
    KISS

    Gas fittings should probably be flared.
  • Jan 6, 2009, 09:35 PM
    MarkwithaK
    Quote:

    Originally Posted by andrewc24301 View Post
    I'd like to know more about this puller, I've run into a lot of situations with stubborn ferrules, especially those that have been on for years, for some reason gas fittings are the worst. In fact, the boss and I were fighting one today, finally just had to cut it off...

    Compression fittings should NEVER be used on gas lines.
  • Jan 7, 2009, 04:48 AM
    speedball1
    Quote:

    Originally Posted by Infodoc View Post
    What is the best way to stop a leak from a newly replaced water compression value with a new ferrule, etc? I have a small leak coming from the back of the bolt that screws into the valve. Is it possible that the end of the copper pipe was not flushed against the valve to get a tight fit even if teflon tape as used?

    Thanks,
    Infodoc

    1)You don't use Teflon Tape on a ferule. (See ferule puller image) TRemove the tape from the ferule and crank down on the compression nut ,(see image).
    2) You NEVER use a compression fitting on a gas line. Flared fittings only.
    Good luck, Tom
  • Jan 7, 2009, 04:59 AM
    KISS

    Only place I've seen compression fitting on gas is a pilot light in a gas stove on about a 1/8" Aluminum tube.
  • Jan 7, 2009, 05:42 AM
    andrewc24301
    Quote:

    Originally Posted by speedball1 View Post
    1)
    2) You NEVER use a compression fitting on a gas line. Flared fittings only.
    Good luck, Tom

    I myself have never seen them on a main "gas line". I'm speaking of the gas lines within an appliance. In which case I've seen a lot. Mostly in older commercial ovens and ranges. Still very common in standing pilots. I recal having this struggle getting a ferrule off a gas line while trying to change a gas valve on an old oven.

    Regarding outside the appliance, no I've never seen a compression fitting used. Normally black iron pipe.
  • Jan 7, 2009, 05:55 AM
    andrewc24301
    Wait wait wait, now that I think about it, the compression fitting was on the gas line leading to the main burner assembly next to the burner. In that case, it wouldn't be pressurized anyway.

    But, almost every standing pilot assembly I've seen uses compression.

  • All times are GMT -7. The time now is 07:29 AM.