I turn the water on half to full volume and the pipes make a jumping noise about every 4 to 5 seconds. The do not make any noise when turning the faucet on or off. If I run the water slow, it doesn't do it, just when I try to get a full stream of water. What can I do to stop this?
It's probably just vibration making the pipes wiggle at a certain flow rate where the vibration wavelength oscillates just right to be amplified into actual pipe movement. Wherever you have access, strap down the pipes. If you do not have access, you will need to decide how irritating the noise is compared to the work required to gain access and strap down the pipes.