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Galvanic corrosion concern with zinc plated pipe fittings in a cast iron pump?
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The pump has a cast iron housing and impeller, and the pipes are going to be copper. I bought some dielectric unions, but the "iron" side is zinc plated. My gut is telling me it's ok since it's only a coating, and therefore will only corrode until the coating is gone, but this galvanic corrosion chart has me unsure. It's an open system, outside, and the water will be pretty conductive. Thoughts?
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