Fix for Noisy Pipes: Cushion the Pipe Hangers
Minimize the sound by pulling off the straps and inserting strips of felt or heavy fabric under the strap before reinstalling them. You may only have to fix the hot water supply line, because that’s the one that changes temperature the most. These are the 10 most common plumbing mistakes DIYers make at home.
Fix for Noisy Pipes: Spray Foam on Vibrating Pipes
Fix for Noisy Pipes: Replace a Worn Washer
An outdoor faucet with a worn-out washer can make a loud vibrating noise when it’s turned on or off. You can easily replace the washer without removing the entire faucet. First, turn off the water to the faucet. Then use a wrench to remove the retaining nut.
Slide the handle and stem assembly out of the sill cock. Remove the screw at the end of the stem and remove the washer. Buy a new washer that matches the old one at any hardware store. Then reassemble the faucet. Occasionally the washer is fine, but the screw holding it is loose. If so, put a drop of thread-locking sealant (sold at hardware stores) on the threads and tighten it.