My daughter had a new pool installed this week. They used the union pictured below. Not sure if your installation would meet code due to rusting issues.
I’ve not seen that particular one, but there are several similar plumbing options for water bonding available. Most of them install in the hard piping, but that’s not the standard for AG plumbing so this seems like a reasonable option.
Technically galvanized steel is both conductive and corrosion resistant, so as long as the surface has the minimum area (9 sqin) and the bonding wire is properly connected to the fitting it would be by the code.
That said, I wouldn’t use galvanized steel (or copper). For pool water bonding I believe stainless steel and brass are far superior (I prefer the later) in their corrosion resistance.
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