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    lrbrmr's Avatar
    lrbrmr Posts: 1, Reputation: 1
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    #1

    Jan 2, 2010, 10:13 PM
    Compression fitting won't fit copper tubing
    Installing new dishwasher and want to use existing copper tubing(10 yrs old), cut off end tried new compression nut and ferrule but it won't fit, I'm sure it's 3/8 but it won't fit, did the tubing expand? What to do to get it to fit? Thanks
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Jan 2, 2010, 10:25 PM

    Is it really close to fitting, or is it way off. If its close, then you will need to just cut back further to get to a straight piece of tubing. If its way off, I would guess that the supply copper is 1/2" o.d.(outside diameter) copper. I personally would suggest getting rid of the 3/8 or 1/2 od copper line and using a stainless steel braided flexible dishwasher supply.
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