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Install the New Stem Assembly — Replace the Seat Washer and O-Ring

Beginner

Part of project

How to Stop a Dripping Two-Handle Faucet · Step 4 of 7

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In this video

Take the new replacement stem assembly, which includes a new stem, washer, and O-ring. Insert the new stem into the valve body. Thread the packing nut back onto the valve body by hand to ensure it is properly seated.

Goal: Replace Valve Internals

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FAQs

Do I need the specific brand-name tools listed, or can I use generic alternatives for this faucet repair?

No, specific brands are not strictly necessary. A basic set of screwdrivers (Phillips and flathead), an adjustable wrench, and a pair of pliers are usually sufficient for this project. The listed tools are recommendations for quality and ease of use, but common household tools will often suffice.

What is the absolute most important safety precaution I should take before starting this repair?

The most critical step is to completely shut off the water supply to the faucet before any disassembly. This usually involves turning the shut-off valves under the sink clockwise until tight, then confirming the water is off by turning on the faucet.

As a beginner, how much time should I set aside for this project, and what's the typical cost involved?

For a beginner, expect to spend about 30 to 60 minutes on this repair. The cost is typically very low, usually under $10-$20 for replacement washers, O-rings, and plumber's grease, as the main components are inexpensive.

I replaced the washer and O-ring, but my faucet is still dripping. What could be the problem?

If the drip persists, carefully inspect the valve seat for corrosion, nicks, or debris after removing the stem again. A damaged valve seat often needs to be cleaned or replaced, or the new washer/O-ring might not be seated properly or is the wrong size.

Install the New Stem Assembly — How to Stop a Dripping Two-Handle Faucet (Step 4, Video 3) | Stesso