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dissimilar metals and problems

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Home Depot Employee
Home Depot Employee Member Posts: 329
in THE MAIN WALL
I know wholesalers like to sell these for the margins, but that is not what the post is about.

Back in the day I used them when the job had room, mainly because of both purposes a Dielectric union serves. However it required more so when exposed to constant oxygen such as potable water systems when two dissimilar metals are connected.

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  • Steveo_2
    Steveo_2 Member Posts: 2
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    Dissimilar metals and problems

    The question I have is, When is a dielectric union needed to isolate dissimilar metals and when is it OK not to use them? Does closed/open loop system make a difference. For instance, Is it OK to install a copper MIP adapter into a BI fitting with no worry of trouble from corrosion in a hydronic system? Thanks for your help.
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