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Is it safe to use copper and galvanized pipes on the same fitting?

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Answer:

Answer

No, you cannot join copper and galvy directly. A brass fitting needs to be between the two to prevent electrolysis.

You could also use a special type of union that has a gasket between the two halves. It is called a Dielectric union. If this junction is between pipes on your water heater and the cold water supply line, you could use a fitting made for that that also is a back flow preventer (ie a check valve).

First answer by Blasirl. Last edit by Blasirl. Contributor trust: 125 [recommend contributor ]. Question popularity: 92 [recommend question].

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