Replace pipes or leave them alone?

[NTM5]

I am renovating my upstairs bathroom and opened the walls. I noticed all the old piping was green at the joints, presumably from a plumber who forgot to wipe the acid flux off. There are no leaks and the copper piping was installed circa 1994. Should I just leave it alone or should I replace everything?

I am comfortable with plumbing my shower and vanity, but replacing the entire upstairs copper piping seems a bit much for me. I'd like to just ignore it.

 

[Jeff Handy]

Post some pics.

Does it look scary or just green tarnish?

Maybe clean off the green crust with vinegar and wipe with plain water.

But I think most here will say to just leave it.

 

[arctic bill]

Copper is good for 65 years unless water is corrosive.

 

[NTM5]

Here are some pics.