> ;3316227']Thanks to everyone again. I'm really interested in that
> mechanics stethoscope deal. Do most plumbers have that? Or do I have to
> call someone special?
No, most plumbers wouldn't even know what it is.
Just look up "Tools" in your yellow pages, and phone the places that
sell automotive tools. All of them will know what a mechanic's
stethoscope is and will probably either carry them or will be able to
order them for you.
Don't pay more than $20 for one because even the cheap ones work well.
Also, there are electronic mechanic's stethoscopes that have a LED read
out that tells you when you're pointing it at something loud. I don't
know how these this work, or even if they work, but the cheap ones you
put on your ears have been a benefit to me in pinpointing all kinds of
noises, from washing machines to furnaces to electric motors to the
engine in my car.
Our hearing is simply not precise enough to pinpoint the souce of a
noise by hearing alone. A mechanic's stethoscope allows you to pinpoint
the source of a noise because it has a metal diaphragm that reproduces
the noise in the ear phones you're wearing. When the metal probe is
touched to the source of the noise, that diaphragm moves the most,
making the noise you're trying to find sound the loudest in the
So, in practice, you would go into your crawl space and touch the probe
to any of the pipes you suspect of making that noise. The pipe that
sounds the loudest is the pipe making the noise. Then you would move
the probe of the stethoscope along the pipe until the noise you're
hearing is the loudest, and that's where the pipe is rubbing on
something, and the rubbing movement of the pipe is causing the noise
Or, at least, that's what I suspect is causing the noise, and that's how
I'd go about finding the source of the noise and correcting the problem.