A dollop of plumber's grease is the best bet for curing the squealing that eventually develops on older, outdoor frost-proof faucets.
Remove the handle. Then loosen the packing nut. Reinsert the plastic handle and unscrew out the entire stem.
Apply a generous amount of plumber's grease to the threads. Then insert the stem and try it out. If it still squeals, add more grease. Then reassemble the packing nut and install the handle.
Outdoor frost-proof faucets eventually develop a squeal when you turn the handle. The brass stem threads are rubbing against the brass threads in the housing. If there's a shutoff valve for the faucet, close it. Otherwise, shut off the main valve. To get rid of the squeal, apply a dollop of plumber’s grease.
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.