Water Hammer in kitchen faucet

Question

I just installed a new sink and faucet and get really bad water hammer when I run the faucet. I never had this trouble before. I made sure the water supplies from the copper to the faucet is as short as possible. How can I fix it?

Answer 1

With the water running, and presumably making the noise, put your hands on the copper pipe - can you feel the vibrations? Does it go away if you hold the pipe? (Be careful of the hot water pipe - it can get, well, hot)

It could be that the pipe is simply loose.

Answer 2

What you have a 'water whistle' not 'water hammer'. One of the supply valves to your sink isn't fully open, creating a pocket of low pressure behind the valve that is oscillating hammer like effect. Fully open your supply valves and the problem should go away.