I need to replace some water pipes in my house to add Shut-offs and to remove some "hokey" setups.. my issue is that I have galvanized running up through the walls to the 2nd story bathroom. Everything else in the house is copper or PVC. I want to run copper to the galvanized, do I need Dielectric Unions, or Brass Fittings?

I need to replace some water pipes in my house to add in Shut-offs and to remove some "hokey" setups.. my issue is that I have galvanized running up thru the walls to the 2nd story bathroom. Everything else in the house is copper or PVC. I want to run copper to the galvanized, do I need Dielectric Unions, or Brass Fittings?

I would use a threaded brass adapter to convert from galvanized to copper. This will avoid electrolysis and keep your system happy. Cheers, Tom