Noisy pipes

[toller]

My 2 story house is about 22 years old.

This morning I was on the first floor while my wife was washing up on the second. The pipes were pretty noisy; more than I remember hearing before.

This concerns me because 2 years ago I replaced some ceiling tiles in the basement and found that a 20' run of pipes had pulled free of all the pipe hangers and was just shaking around. I reinstalled better hangers and it seems fine, but it worries me about the plumbing quality in general.

I don't know much about plumbing, but presumably the pipes upstairs run though holes in joist and can't move around much?

Should I be concerned about the noise? Is there anything, other than ripping up the floors and walls, to be done about this?

Thanks.

[Art]

22 years ago a few builders started using floor trusses instead of joists, sometimes only on upper floors. In that case, the pipes would be using the same poorly installed hangers. Unlikely but possible.