You don't have to rely on liquid drain cleaners to
Instructions
1. Turn on the faucet to allow approximately 1 inch of water to fill the sink, if the sink doesn't already have at least 1 inch of standing water. The water will provide pressure to force the clog through your pipes and is essential to unclogging the drain.
2. Grasp the handle of the plunger and place the plunger cup over the sink's drain. Tilt the handle of the plunger to one side to move a portion of the outer edge of the plunger cup above the standing water. This will release any air that was trapped in the plunger cup when you submerged the plunger.
3. Replace the plunger cup firmly over the drain.
4. Repeatedly press the plunger down and quickly pull it back up for approximately 15 seconds, or until the water in the sink drains, whichever comes first. If there is still standing water in your bathroom sink after 15 seconds, refill the sink with 1 inch of water if some of the water drained and repeat the plunging for an additional 15 seconds.
5. Check the water level and plunge the drain in 15-second intervals until the drain is unclogged, which usually takes four cycles of plunging or less, according to the book, "Plumbing Do-It-Yourself For Dummies."
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