transitioning from galvanized to copper

[Jm66208]

Gonna tear out some old galvanized and replace with copper. Cant replace it all so I 'm gonna have a 3/4"galvanized to 3/4" copper transition. Figured I'd use a 3/4" brass threaded coupler off the galvanized pipe, then a 6" brass nipple, then a copper FIP to sweat fitting and continue on with my rigid copper. Lotta connections there, but is there a better way? The existing plumbing has some dielectric unions where others have transitioned to copper but they show signs of corrosion.

 

[Smooky]

How about this?

http://www.homedepot.com/p/LDR-Indu...-Sweat-Dielectric-Union-FSU-LFDU-34/202246034


http://www.grainger.com/category/di...ittings-and-couplings/plumbing/ecatalog/N-n0b

 

[Sponsor]

 

[Terry]

existing plumbing has some dielectric unions where others have transitioned to copper but they show signs of corrosion.

I would not bother installing dilectric unions. They close off very quickly.
Junk.
I've been using 6" brass nipples for transistion.
It's also one reason I don't like leaving any galvanized in a building once I've started replacing with copper. Any time you transistion, it's a probem.

 

[Jm66208]

Thanks Terry, Unfortunately I don't have the option of removing all the galvanized in this situation.