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Best Solution for Connecting Copper to Iron Boiler

bassman92
bassman92 Member Posts: 8

The picture above is the return line on my boiler, which obviously needs to be replaced.

It’s currently copper ⇒ iron elbow and nipple ⇒ boiler.

Is there a better way to connect this to prevent galvanic corrosion?

As far as I understand, here are my options:

  1. Replace with the same. Replace again when it inevitably corrodes.
  2. Use brass or bronze nipple and elbow. (Will this cause my boiler to corrode faster?)
  3. Use a dielectric union. (But then I need a ground jumper, right? That doesn’t defeat the purpose of the dielectric union?)

Which option is best? Or is there another solution that I’m missing?

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