Excellent!, you mark all your plumbing inputs and outputs, I do too, makes for foolproof troubleshooting next time around and it also helps anyone access those connections a lot easier than having to guess which one is the in and the out, in case of an emergency, at the very least you know which is the bypass valve . You must be an engineer or a tech. One's tools also say a lot about a person, but mainly it is the approach one takes. I can tell your very methodical cause that is the way I am. A man, especially, the head of a household, should know how to fix all sort of things, and it is important to pass those skills and knowledge to one's kids. Thumbs Up!
Where you messed up is you used galvanized connected directly to stainless steel it causes accelerated corrosion. You're not supposed to use dissimilar metals the solution would have been if you would have used schedule 80 PVC nipples that would solve your problem and would be cheap or to use brass nipples which would be more and then it'll never happen again.
