copper galvanized direct contact?

[jjones2]

Is this a galvanic reaction area of concern? direct contact and water movement creating electron activity! what say you??

John

[David P. Valley]

Originally Posted by jjones2

Is this a galvanic reaction area of concern? direct contact and water movement creating electron activity! what say you??

John

Absolutely.

Simply recommend separating all copper supply piping with a non-combustible material.

[Jack L. Gilleland]

Funny, notice how the solder took on both metals. Doesn't mean anything, but I rarely see the water lines soldered to the duct.
I agree with David. Any dissimilar metals (ferrous to non-ferrous). The copper pipe is non-ferrous and the duct is ferrous, even though it has a tin content.
You can solder steel if the tin content is high enough.

[Joe Funderburk, CMI]

I've seen leaks in copper pipes for the exact same reason you illustrate. It will corrode and leak with time.

[rmaday]

Originally Posted by jjones2

Is this a galvanic reaction area of concern? John

Yup!