I will be replacing the galvanized pipe from my water heater with the flex copper pipe. Any install advice?
They're OK but for flexible connections I prefer the braided ones.
Any tips installation wise?
I know, I'll be cutting off water. Do, I have to shut off gas? I wouldn't think so
Do I have to drain?
Other than avoiding kinking the supplies, it's straightforward.
But do I have to drain?
Not the entire heater, no. Just drain the pressure off before unhooking or cutting anything. If your water piping is ran overhead, drain as much as possible out by opening all of the faucets and shower valves at the same time.
Lake County, Florida plumber
Springtime Plumbing Services, LLC