Galv. pipe in hydronic systems with treated water

Gordo

I've seen dark hints of problems caused when galv. pipe is used in hydronic systems with treated water. As I understand it, the zinc and the chemicals used for treating the water interact in negative ways. What are these problems, specifically? Would a 3/4" x 6" galv. nipple in a 500 gal. system be an issue? Thanks for your help.

hr

Depends on the treatment

and what is blended in the conditioner. I know Dow cautions against the use of galvanized pipe of fittings, as the inhibitors in there glycols react with the zinc.

I imagine this could be the case with some hydronic conditioner fluids also.

hot rod

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