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Remove the Valve Stem — Remove Old Valve Stems

Beginner4 hours

Part of project

Tub Faucet & Shower Valve Replacement: A Complete DIY Guide · Step 3 of 6

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In this video

After removing the handle, remove the two plastic pieces sitting on top of the valve stem by hand. First, remove the white plastic adapter piece, then unscrew the black plastic retaining ring. Next, use a socket wrench with a deep socket that fits over the valve stem's hex nut. Turn the wrench counter-clockwise to loosen and completely remove the valve stem from the faucet body.

Goal: Extract the valve stem

Used in this video

  • Socket Wrench (brand: unknown, Wrench Type: Socket)Unscrewing the valve stem from the faucet body.
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This Old House

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FAQs

What should I do if I can't find or turn off the main water supply to my house or apartment?

Locating and shutting off the main water supply is the most critical first step. If you can't find it, check your water heater for a shut-off valve, or contact your building manager or a professional plumber. Do not proceed with the project until the water supply is completely off to avoid significant water damage.

Besides the screwdriver and adjustable wrench, are there any other essential supplies or tools I might need for this tub faucet replacement?

Yes, it's highly recommended to have plumber's tape (Teflon tape) for sealing threads, penetrating oil for loosening stuck or corroded old parts, and a small wire brush for cleaning debris. You might also find a basin wrench helpful for reaching nuts in tight spaces behind the tub wall.

I've replaced everything and turned the water back on, but the faucet is still leaking. What should I check first?

First, re-check that the new valve stems are fully seated and securely tightened, but not overtightened. Ensure all O-rings are correctly positioned and intact, as a misplaced or damaged O-ring is a common cause of leaks. Also, verify that the connections to the water supply lines are tight and sealed with plumber's tape.

Is 4 hours a realistic estimate for a complete beginner, or should I budget more time, especially if I encounter stuck parts?

While 4 hours is a good estimate for someone with some DIY experience and no major issues, a complete beginner should budget more, perhaps 6-8 hours. Encountering corroded or stuck parts, or making unexpected trips to the hardware store for forgotten items, can significantly extend the project time.

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