Using compression fittings vs soldering

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by xms, Nov 4, 2008.

  1. xms

    xms New Member

    Messages:
    1
    I'm replacing cabinets and since the original waterline to the dishwasher was added after the old cabinets were installed, I need to cut it and then reconnect it once the new cabinets are in. I have 9 ft. of 1/2 in. copper tubing (makes a 90 deg. turn behind the cabinets) from the shutoff valve to the dishwasher flex connection. 1 1/2 ft of the tubing is accessable under the sink in the cabinet. I'm going to try to attach a picture to this thread.


    If I cut the tubing approx. 6" from the sweated joints of the shutoff valve, will compression fittings on the tubing allow a proper connnection that won't leak?

    If that's not a good idea, if I cut the copper pipe just before the reducing connector, would compression fittings for copper pipe-to-copper tubing allow a proper connection? I don't think I have enough copper pipe to do a copper pipe-to-copper pipe connection with compression fittings.

    Advice?

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,416
    Location:
    Bothell, Washington
    Most plumbers are using compression shutoffs unless you live in an area that doesn't allow that.

    I don't even know what State that would be in.
    I've never soldered on a chrome stop before.
  3. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    Here in the northeast sweating on stops is pretty much the norm...
    It's either that or, threaded on...
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,247
    Location:
    Cave Creek, Arizona
    stops

    That is usually a feature of a state, or area, with a strong union, because they resist anything that installs easier or faster, or is easier for the homeowner to repair/replace in the future.
  5. Ian Gills

    Ian Gills Senior Robin Hood Guy

    Messages:
    2,777
    Location:
    USA
    I have said it before and I will say it again. The best piece of advice I ever got from this site was to solder on good quality brass nipples and use thread-on quarter turn angle stops.

    That way I never worry about leaks or replacement.

    Not that you would worry about leaks or replacement with a properly installed compression angle stop but I am just a worrier like that. Compressions should not be used where there is any chance of movement and I always worry about bumps, particularly in my kitchen/bathroom cabinets. Obsessive and irrrational I know.

    Don't mention lawnmowers.
    Last edited: Nov 5, 2008
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