An unusually noisy outdoor faucet may be due to something as simple as a worn-out washer. To find out, disassemble the faucet from the outside, then check the condition of the washer.
By the DIY experts of The Family Handyman Magazine:March 2006
Disassemble the faucet by turning off the retaining nut.
Pull the handle and stem assembly out and replace the rubber washer.
An outdoor faucet that makes a loud vibrating noise when it's turned on or off probably has a worn out faucet washer. You can easily replace it without removing the entire faucet. First, turn off the water to the faucet. Then use a wrench to remove the retaining nut that's attached to the sill cock (Photo 1).
Slide the handle and stem assembly out of the sill cock. Remove the screw at the end of the stem (Photo 2) 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 Threadlocker, or a similar product, (sold at hardware stores) on the threads and tighten it. Some faucets have a spring-loaded sleeve near the washer. If you have this type, replace the entire faucet.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.
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