How to Repair a Compression or Stem-Type Faucet

These simple steps will help dry up the problem of a leaky compression or stem-type faucet.

Instructions

Difficulty: Moderate

Things You’ll Need:

• Replacement Washers And Gaskets
• Clean Rags
• Masking Tape
• Crescent Wrenches
• Screwdriver Sets
• Valve Seats

1. Turn off the water at the water-supply valve. These are usually under the sink (or in the wall behind the shower assembly - often in a closet behind a removable panel). If there are no localized shutoffs, use the main water shutoff for the building.
2. Open the faucets to let water in the lines drain before beginning disassembly of the faucet.
3. Remove the faucet handle; virtually all handles are fixed with a screw, which may be hidden under a decorative cap that can be pried off with a small screwdriver. Remove the screw, then lift or jiggle the handle off.
4. Loosen the locknut inside with a crescent wrench. Once the nut is loosened and removed, pull out the stem. (With some types of faucets, the stem itself may be threaded into the body of the faucet assembly. It may be a left-handed thread - which means you'll have to turn it counter-clockwise to loosen and remove it.)
5. Find the rubber washer at the stem's bottom. The washer may be held in place with a small screw; if so, remove the screw.
6. Replace with a new washer. Take the stem to your local hardware or plumbing supply store to pick out the proper-fitting replacement washer.
7. Reassemble the stem and faucet assembly in reverse order.
8. Turn the water supply back on and test for drips.

Tips & Warnings

• As you take the unit apart, lay out the parts on a clean surface in the order in which they were removed.
• If the faucet still leaks after you've replaced the washer, you may have to replace the valve seat, which requires a special wrench. The valve seat is located below the stem and can be accessed when the stem is removed.
• If one washer needs to be replaced, replace them all now.
• When working with chrome or brass fixtures, protect the surfaces from tools with a piece of leather, heavy cloth or duct tape.

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