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Thread: Best flux for 95/5 solder in air compressor application

  1. #1

    Default Best flux for 95/5 solder in air compressor application

    Now that I have decided to solder 3/4" copper lines for my air compressor, I am seeking advice on the most appropriate flux. I will be using 95/5 solder and was wondering if the choice of flux is that important. I have Oatey #5 flux and Oatey #95 tinning flux lying around. Is there any real difference?

  2. #2
    Plumber Cass's Avatar
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    Nov 2005
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    Default

    Personaly, I like the #95 tinning flux. When I switched to it my leak rate dropped to about 1 every 3 years. I can't even remember the last one.

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Default flux

    As a practical matter it does not really matter as far as the final project is concerned. Some, such as the tinning fluxes, will work easier, but it will not affect the integrity of the compressed air lines.

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