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How to Clear a Blocked Sink Drain

Clearing a blocked sink drain requires only few basic tools and a little elbow grease.

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GogglesPlumbing snakePlungerSealerWrench

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How to Clear a Blocked Sink Drain

  computer-generated transcript - may not be 100% accurate

" How to clear a blocked sink drain. Before you try anything else, try a plunger. Place a wet rag over the overflow drain to create suction. Use an upward motion to pull the blockage and clear the drain. Be sure to wear goggles to protect yourself from splashes. If the block edges in a kitchen sink, place a wet rag over the other drain to create suction. Often this will work and you won't have to do anything further. However, if the plunger doesn't work, here's how to proceed. Under the sink at the lowest point of the drain, look for clean-out plug. If there's no clean-out plug, then you'll likely have a curved trap with two couplings. By loosening the two couplings on either end of the curved trap, you can remove the entire trap. To remove the drain plug, use a plumber's wrench to loosen the plug and then unscrew it by hand. Place a bucket or pan under the plug to catch the water. Once you have access to the inside of the trap either by removing the drain plug or removing the entire trap, push a plumber's snake through the trap and up into the pipe. By working the plumber's snake up both ends of the pipe, you will likely dislodge the material blocking the drainpipe. If your drain has a curved trap, you can use the snake to push out debris, or simply flush out the trap with hot water. In a bathroom, you'll need to remove the drain stopper, which is attached by a lever to the knob on your sink. As a lever goes up and down, it lifts and lowers the drain plug. To remove the drain stopper, unscrew the knot on the back of the drain pipe, and pull the lever out that passes through the slot on the drain plug. You will now be able to lift the drain plug from the sink. Having removed the drain plug, you can now work the plumber's snake down the drain pushing any debris out the bottom of the trap. To hook the drain plug back up, place the drain stopper back into the drain with the slot opening facing the back of the sink. Slide the control rod back into the hole in the drain stopper. This may take more than one try, and then, hand-tighten the knot holding the control rod in place. When you replace the drain plug after clearing the block trap, use a little compound to seal the threads and prevent leaks. Whether you're reassembling a removable trap or replacing a drain plug, tighten the joints first by hand, and then make it snug with an adjustable wrench. Do not over tighten. Run hot water in the sink. If the clog was caused by debris in the drain or trap, water should now drain freely."

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