to be a little more specific. the noise sounds metallic.
"Ryan" wrote in message
...
I do not know what is going on. It seems to only happen at night. One time
it happened at 3PM and its getting worse. Its not happening about every
3-10 minutes. There is a loud high pitched screech that seems to come from
the wall near my bathroom. its hard to tell.

i thought it was the pipes so i turned off the main water valve and this
did not improve anything. I do not know why it doesn't happen during the
day. The screech lasts about 1 second, but recurs.

any idea?