I live in an 8 unit co-op. Recently had the bathroom totally redone. New pipes and bathtub/shower. My new shower seems fine. Not long after I got this done I have noticed someone is causing a high pitched sound when they take a shower. Could the plumbing done in my unit cause someone else to experience this problem? Could the pressure change in my Unit cause someone else to have pressure problems. What should I do about it? The noise is very load.