I bought a house last year and it has a main bath that is adjacent to a living room. Whenever the water runs in the bath it is very loud in the living room - right on the other side of the wall. Doesn't matter if it is sink, toilet or shower. It is loud. What options do I have to quiet the noise? I don't think it is vibration from the main or anything like that, just water flowing through faucets and valves. In my last house I built it myself and insulated the walls around the bathrooms. Twofold, one to keep water noise down and two, to keep human noise from escaping. The walls around the bath also help enclose the master bedroom with insulation noise barrier. I am not opposed to removing drywall and filling the cavity with insulation. Is there a best kind? I just used a plastic enclosed fiberglass batt in the old house. But have thought maybe spray foaming the pipes would be easier here. Though it would be a beeeeaaaatch to work on later if needed. Any ideas?