I need to replace ALL the old galvanized pipe in a two story house with copper. PEX is not code in Chicago. Any tips on running to second story (especially shower) without completely destroying walls? Can I just disconnect the old galv. and leave it in or should I try to cut it out?
It's a challenging job, I would remove all the galvanized pipe if possible. I don't like running into decommissioned wire and pipe when I'm on a job. You have to think about the next guy coming to do work in the future. A tip for making the connections. Get a flame shield and keep a pail of water close by. Also pre-tinning the pipes can be helpful in those really hard to heat places.