Shower pipes came unanchored

A couple of questions;
1) I think my shower pipes have become unanchored. How do I determine if this is the case before tearing out the wall? When turning on the shower it runs fine and makes no noise for about 3 minutes and then starts banging very loudly. I have seen no evidence of any water leaks. We do have hard water.
2) If I do have to tear out the wall to get to the pipes; how do I remove a cultured marble piece without destroying it in an effort to reuse it? It is one piece about 4 feet wide by 5 feet tall.

Linda

What kind of shower control valve do you have? Sometimes, if it has a washer in it, those can be a little loose and vibrate. It may be as simple as replacing the washer.

I don't know what kind of control. I was kind of messing with it today (jiggling it - you know the girly kind of fix) and it seemed to get better. So maybe that is it. I will have my husband look at it when he gets home.

Thanks for the quick reply.

Linda

valve

One handle shower valve or two handles? You describe the type of problem that can happen with a two handle valve.

It is one handled shower control.

We have taken 2 showers in there with no noise, so hopefully it was just an air bubble that worked its way out. I am keeping on eye on it to make sure it doesn't leak.

Linda