I have a 100+ year old house which originally had galvanized pipe. I replaced all with copper except one that ran up through the walls to a second story bath. Now have noticed that we are getting stains ( green pink) in our tub and stool. The water tastes terrible from the sink. Any suggestions beyond tearing up the bath floor where one of the galv/ cop connections are. I can access the galv/ cop connection in the lower level. If I put a dielectric fitting in the connection at the lower level, will I still need to in the upper level?
