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    Ron48's Avatar
    Ron48 Posts: 2, Reputation: 1
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    #1

    Jun 6, 2011, 01:09 PM
    Is a brass fitting as good as a dielectric insulator?
    Copper water pipe to sprinkler system.
    Dr1757's Avatar
    Dr1757 Posts: 186, Reputation: 25
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    #2

    Jun 6, 2011, 01:35 PM

    No, brass will not act as a dielectric insulator.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #3

    Jun 6, 2011, 01:35 PM

    Hi Ron...

    NO! A brass fitting is not going to be as good as a dielectric fitting. Here, the dissimilar metals (brass to black iron) will create an electolytic effect where the metals join and minerals will deposit on the interior of the pipe. With a dielectric fitting this electrolytic effect and therefore the mineral deposit is supposedly negated.

    More questions? Just let us know, OK?

    Mark
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
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    #4

    Jun 6, 2011, 01:36 PM

    Tie post Doc... ;) 4:35 PM
    Ron48's Avatar
    Ron48 Posts: 2, Reputation: 1
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    #5

    Jun 6, 2011, 01:38 PM
    Comment on Dr1757's post
    If you remove the galvanized elbow and it is a copper to brass fitting you are saying I still need a dielectric insulating union??
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #6

    Jun 6, 2011, 05:18 PM
    Any fitting that is non conductive would wrk, e.g. Schedule 40/80 PVC or CPVC would work.
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