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Thread: What kind of Copper to CPVC fitting is this?

  1. #1
    DIY Senior Member JerryR's Avatar
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    Default What kind of Copper to CPVC fitting is this?

    I have good amount of experience sweating copper. I also have done a lot of PVC work with my irrigation system. I have no experience with mating copper to CPVC. I've replace several water heaters using copper only. Our vacation home has CPVC connected to the heater which I will be replacing shortly.

    Looking at the pictures you can see the adaptor is sweated onto the copper not very far from the wall. I do not want to put a torch to this as it is too close to the interior garage wallboard. Not being familiar with this adaptor I have several questions?

    Can someone tell me how the CPVC attached to this fitting?
    Is it threaded?
    Can it be reused?
    Is the CPVC 90d a special 90 to connect to the adaptor?

    I will be replacing the WH and before cutting out the CPVC I want to make sure I have what I need to complete the job.

    Jerry
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  2. #2
    Test, Don't Guess! cacher_chick's Avatar
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    It appears to be a copper to PVC transition union, which should unscrew.

  3. #3
    DIY Senior Member JerryR's Avatar
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    Quote Originally Posted by cacher_chick View Post
    It appears to be a copper to PVC transition union, which should unscrew.
    So is it similar to one of these? I then should put an open end wrench on the flat to prevent the 3/4? copper from rotating and rotate the knurled ring counter clockwise with a pipe wrench?

    Jerry
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  4. #4
    Test, Don't Guess! cacher_chick's Avatar
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    Using a pipe wrench could distort the knurled fitting.

    I would give it all I had with my hand first (a glove might help).
    If I had to use a tool, my first choice would be a strap wrench.

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