For years I used dialetric unions to trans. from Galv. pipe to copper. About 3 years ago I started using brass nips. and a Fem. adp. to do it on 1/2" lines in peoples homes who didn't want to change out all the water pipe. For some reason I thought this was O.K. I have done some checking and it seems it is not.
My question is if 2 dissimilar metals coming in contact with each other in the presence of an electrolyte, in our case water, and where a conductive path exists creates the problem, then why do Water Heater Mfgrs. use brass T&P valves and some brass drain valves?
My question is if 2 dissimilar metals coming in contact with each other in the presence of an electrolyte, in our case water, and where a conductive path exists creates the problem, then why do Water Heater Mfgrs. use brass T&P valves and some brass drain valves?