House is a 1922 Foursquare and I've real low cold water preassure to the second floor. Just bought the house. Hot is fine. While pipe in the basement and the first floor looks to be copper, I can definitely see a galvanized cold supply running up from the basement. Assuming it needs to be replaced is there a way to fish PEX up the wall through the holes the pipe is in now? Looks like a question for a plumber to answer on-site but thought I'd begin here.