Plumbing noise ?

[Bass_Bully]

I added some can lighting in my living room a couple weeks ago. I ran into a little problem cutting out the ceiling for one of the cans. There was a hot and cold water line that was in the way by about an 1" so I used a zip tie to pull the two pipes closer together to make room for the can. Now I hear a few clanking noises everytime the upstairs bathroom water is turned on(which is the same pipes I zip tied) and every once in a while a clank out of nowhwere. Is this any cause for problems? Why would it be making this noise?

[Redlantern]

Short answer, yes, this is something that can cause you trouble in the future. When you forced the pipes out of the way for the light, you may have loosened some of the hangers or supports that a plumber put in. The sounds you are hearing are probably the pipes rattling when you turn on or off a plumbing fixture quickly. Pipes aren't meant to be installed under pressure. When the zip ties break, the pipes will probably end up rubbing against the light. If you have copper to metal contact, generally the copper loses. Meaning it can develop holes in it due to electrolysis. Disimilar metals, huh, can't they all just get along? I think you are going to have to reroute the copper lines using a little copper and some fittings so it's not under tension. Hopefully you can get to the hangers that you might have loosened and refasten them.