So for those living in apartments..

We are in a downstairs unit and our upstairs neighbors are already very loud. We've dealt with that and have come to terms with it. My issue now is that they don't make sure their toilet thing fills up all the way and the water runs for literally hours at night. Their plumbing runs directly down through our master bedroom and it's extremely loud. (Poor insulation I think.) It's loud enough that it keeps me awake quite often. Is it reasonable to ask management to tell them to make sure their toilet doesn't run so that we can sleep? I haven't lived in apartments very long and I know noise is normal, but this seems a little excessive to me. I've already spoken with the neighbors personally about a separate issue and got a door slammed in my face, so I'm not too inclined to just ask them myself.