Clogged drains can be a real nussance. There are a few home-remedies you can try before calling a plumber.
- Baking Soda
Most people start off with a store-bought solution, which may or may not produce results. These products are typically $10-20(US) and be purchased cheapest at Home Depot stores.
Try using the plunger on the drain after letting it sit 15 minutes, then flushing with hot water while plunging like a crazyman. Make sure to get a good airseal on the plunger over the drain, if one is not obtained, try a bigger plunger.
Several people have reported using Clorox bleach and/or Baking Soda instead of the commercial products, yielding better results.
Another trick, which may or may not work, is to plug up all the drains in the sink with towels, and run a hose full-blast down the drain, in an effort to blow out the clog.
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If nothing else, call your local plumber.