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I need to pipe a hot water recirculation system for my hot water heater. I need to T into the drain spigot on the bottom. I will use a short galvanized nipple, galvanized T, then a spigot. The other side of the T will be copper. How can I keep this from corroding? It already has this system installed and has very bad corrosion. Do they sell 1/2 copper nipples, T's, etc.? I could also go with a dielectric union at the top of the T and at the spigot. What are my options here?

Thanks
 

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GC/Master Plumber/Mech
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1,517 Posts
Please use brass T's and nipples
 

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BIGRED
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487 Posts
What Plumber 101 said. Steel and copper do not mix. Bronze is nonreactive with copper and will not cause the the threads in your tank to corrode either.
 
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