Any tips on capping off angle stop

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by chefwong, Sep 10, 2006.

  1. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    I bought a 3/8" compression cap to go on a angle stop.
    Put a libleral application on pipe tope on the threads and the cap wrenched on easily till it hit the bottomed out - end of the angle stop body.

    Still leaks water - slight drip if the valve is opened.
    I am capping it for this very same reason (even though the valve can be closed, if someone turns it by mistake.....I don't want any water coming out).

    Any advice...
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,811
    Location:
    Cave Creek, Arizona
    cap

    You have to make a solid rubber washer the size of the cap and put it into the cap before you tighten it.
  3. plumber1

    plumber1 Plumber

    Messages:
    1,423
    Location:
    Florida
    Take a nipple and grind an end to a thin taper and use it for a gasket maker. You will make a round rubber washer for your cap. I think you use a 3/8" nipple.
  4. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
    2,716
    Location:
    Central Florida
    Or flatten, fold, and solder a piece of 3/8 copper to seal the end and put it in the compression fitting normally.
  5. Winslow

    Winslow Plumber

    Messages:
    450
    Location:
    Hawaii
    you still need to use a ferrule when using a compression cap
  6. chefwong

    chefwong New Member

    Messages:
    710
    Location:
    District of Columbia
    Hmm - didn't think of using of the ferrule....

    With ferrule, does it cap tight without the suggestions of the DIY washers ?
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