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Drain any water or air from the valve. On faucets, turn off the water supply, before turning on the faucet. Open the faucet, until it runs dry.
On tires, this means opening the valve cap, by unscrewing it, counterclockwise, and bleeding the air from the tire.
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Remove any obstructions above the valve stem.
On hose faucets, for example, unscrew the handle, above the valve. Locate the set screw for the handle, and turn it all the way out, counterclockwise, with the screwdriver.
On tires, the cap should already be off, to drain air from the tire.
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Thread the removal tool onto the valve stem, turning it clockwise all the way down.
Use the segmented, hollow, threaded (female) end to attach the tool to outer (male) threads on the valve stem.
Use the solid, narrow, pointed threaded (male) end to attach the tool to inner (female) threads.
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Pull out, straight, on the handles of the tool, with your hand, to lift the valve stem out of the socket.
If the tool uses a lever to apply the pulling force, toggle this lever, rather than pulling up on the tool.
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Unthread the tool from the removed valve stem, turning it counterclockwise. Keep the valve handy, to identify the correct replacement part.
