I am remodeling a secound floor bath room, the whole house has 3/4" galvenized pipe from the origanal remodeling from and old barn.
So that I don't have to tear up the new remodel if the old pipes go bad I am replacing from the basement up. My question is should I reduce the size of pipes to the secound floor to 1/2" or leave the same 3/4" all through the house.