My brother and I are going to help my dad replace part of his water supply line that is corroded. We plan to cut out about 60 feet and tie into the 40 year old galvanized pipe at a fitting. The galvanized pipe looks good from the outside at this point, but we are worried that the fitting will be too corroded to hold up so may cut the pipe further out and try to rethread it. ...and we're worried it may not be in good enough shape to hold a good thread. What are some other options? We're thinking a compression type fitting (1-1/2" to 2") to tie the galvanized pipe to PVC which we'll run to the house. The pressure is probably 100 to 140 psi, ...at a guess.