Here are the most commonly recommended methods for clearing a clogged sink drain:
Plunger. Be sure the plunger’s suction cup is large enough to cover the drain opening or your work will be an exercise in futility.
1) Fill the clogged basin with enough water to cover the plunger cup.
2) Coat the rim of the cup with petroleum jelly to create a tight seal.
3) Use wet rags to block any outlets—a sink overflow or second sink—thereby creating a vacuum.
4) Give the plunger 15 to 20 strong strokes.
5) Repeat several times if necessary before turning to other remedies.
Chemicals. Never use chemicals if the drain is completely clogged. They can burn your skin; if they sit in a stagnant drain, you’ll have to figure out a way to remove both the chemicals and the blockage without splashing water on yourself. Also don’t use them routinely because they can damage metal pipes.
1) Make sure the room is well ventilated.
2) Wear rubber gloves and eye protection.
3) Read labels carefully to make sure you choose the right kind of drain opener—an alkali to cut grease and an acid to dissolve hair, soap, and other gunk.
4) Never mix chemicals, and do not use chemicals in combination with a plunger.
5) Don’t look down the drain—chemicals give off toxic fumes and can boil up suddenly.
Drain auger. Use a drain auger to snake a drain.
1) Remove any filters or stoppers and guide the auger through the drain opening.
2) Gently work the auger around bends in the piping as you feed it through.
3) When you’ve hooked the blockage, pull the auger back a little to free it.
4) Turn the handle of the drain auger to bore through the clog and then push it through the pipe or pull it out through the drain.
5) If feeding the auger through the drain doesn’t work, try feeding it through a system cleanout.
6) For a deep clog, first remove the sink trap, as shown at right. To do this, unscrew the couplings (catch water in a bucket placed beneath the trap). Work the auger through the drain pipe to free or extract the clog.
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