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Moderator Post (s) for this thread: > The start of the thread by doug seibert on 01/25/2005 > attn Lonny the plumber by doug seibert on 01/26/2005 > The EUREKA moment ? by doug seibert on 02/01/2005 > Tension In Toronto by LonnythePlumber on 02/01/2005 > Me Too by LonnythePlumber on 02/02/2005 > and I'm not a Plumber by doug seibert on 02/02/2005 > I think you've got it....... by doug seibert on 02/02/2005

Thanks. Here goes:
House fairly new - built 1999. Builders Model home. Original owners lived there 3 years. We moved in about 1 1/2 years ago.
BASEMENT: Unfinished when we moved in. Am 3/4 in process of finishing it. Currently drywalling ceiling. FYI: The banging noise was there in the basement when we moved in - The kind where the pipes are vibrating with the beam. Re-clamped the entire path of the cold/hot pipes, every 1 to 2 feet, to the beam (did not move any pipes), packing them the pipe insulation to prevent the screeching of copper clamps with the copper pipes. This helped amazingly - It is pin-drop silence, now, in the basement, when water is run on upper floors.
Meanwhile, the banging sound on upper floor continues - maybe increased since I reclamped the pipes in the basement.
WHERE: From the basement, I can see the pair (hot and cold) of water pipes in the basement ceiling, that go up on to the inside of the family room wall on the main floor. Noticed the previous owner/builder has a piece of wood wedged inside the two holes in the basement ceiling, where the two pipes go upstairs (guess to clamp them from vibrating). The LOUDEST banging of the pipes is heard in the wall on the main floor family room, where it comes from the basement. We can distinctly hear it banging inside the wall, far away from one of the top floor bedrooms. Since this is our family room, it is the room most used (also called TV room). These pipes inside the family room, then continue on to the ceiling of the family room for about 15 feet inside the ceiling, where we can hear faint banging once or twice but not as annoying. The ceiling of the family room, is the carpeted floor of 4th bedroom above, and the problem toilet/shower (Master Bedroom) is right adjacent to this 4th bedroom. After running about 15 feet in the family room ceiling, I guess it feeds cold water to the toilet above in the master bedroom, where the hot/cold pipes must be feeding to the nearby shower, the two sinks, and the stepup tub (never use it). Funny part is, even though the shower/toilet (master b'room) are the culprits, the banging of pipes is seldom heard in the washroom, if so, and if so, very faint if at all. Seems the noise is transferred from the source (master b'room washroom) to the wall in the family room, where the pipes lead to the wedged location in the basement.
The noise in the family room wall is so loud at times, that it can be heard from any corner of the house (except the basement).
Sorry for the long note, but hope I have explained it to your understanding.