How do I unclog a double kitchen sink?

Start with the garbage disposal side if you have one - turn it off and disconnect power, then try plunging that side first since clogs often originate there. If no disposal, begin with whichever side drains slower.

The key to double sink success is proper plunging technique. Fill the clogged side with 3-4 inches of hot water, then completely seal the other drain with a wet rag or second plunger. This creates the pressure needed to push the clog through. Use a cup plunger (not a toilet plunger) and plunge vigorously for 30-60 seconds. The water should start draining if you've broken up the blockage.

If plunging fails, try the baking soda method. Remove standing water, pour 1/2 cup baking soda down the drain, followed by 1/2 cup white vinegar. Cover both drains with plugs or wet rags for 15 minutes, then flush with hot water. This works well for grease and food particle clogs common in kitchen sinks.

Ottawa homes often have older cast iron or galvanized pipes that are more prone to buildup and recurring clogs. If your double sink clogs frequently, especially if both sides back up simultaneously, this typically indicates a problem in the main drain line rather than just the sink trap. Kitchen sink clogs can also be complicated by Ottawa's hard water, which accelerates mineral buildup in pipes.

Avoid chemical drain cleaners in kitchen sinks - they can damage pipes and are dangerous if they splash back. Never use them if you have a garbage disposal. If the simple methods above don't work within 30 minutes, or if sewage backs up into the sink, it's time to call a professional. Persistent double sink clogs often require drain snaking or camera inspection to identify blockages in the branch line or main drain.

For recurring kitchen sink issues or if you suspect a main line problem, Ottawa Pro Plumbing offers camera inspection services to pinpoint the exact location and cause of stubborn clogs.

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