Hi All,

We have a wood floor and a crawl space under the house.
We also have long runs of copper fresh water paper
in the crawl space.

When you turn on the water at one end of the house, the
pipes will shake at the other end and are rather
loud. If you run a tiny trickle of water on the outside
faucet, the pipes will start a harmonic resonance.
Also kind of noisy.

Now this is a "contractor's" house, mean no expense
was spared (meaning that sarcastic). There are not
a lot of hangers on the fresh water pipes. Would
more hangers improve the situation? Any other thoughts?

Many thanks,
-T