Why does my bathroom sink drain slowly?

A slow-draining bathroom sink is typically caused by a buildup of hair, soap scum, and toothpaste residue that accumulates in the drain and P-trap over time. This creates a partial blockage that restricts water flow, making your sink drain sluggishly rather than quickly.

The most common culprit is hair combined with soap and personal care products that form a sticky mass in the drain. Unlike kitchen sinks that deal with food particles, bathroom sinks collect hair, whiskers from shaving, and thick substances like toothpaste and face wash that gradually coat the pipe walls. Over time, this buildup narrows the pipe opening and catches even more debris.

Pop-up drain stoppers in bathroom sinks are particularly prone to collecting hair and gunk around their mechanism. The stopper assembly creates additional surfaces where debris can accumulate, and many homeowners rarely remove and clean these components. Additionally, older homes in Ottawa may have galvanized steel pipes that develop internal corrosion and mineral buildup, further restricting flow.

For immediate relief, try removing the pop-up stopper (usually by lifting and twisting) and cleaning off any visible hair and debris. You can also try pouring very hot water down the drain or using a basic plunger designed for sinks. However, avoid chemical drain cleaners as they can damage pipes and are often ineffective on hair clogs.

When the problem persists or returns quickly, it's time for professional drain cleaning. A licensed plumber can use specialized tools like drain snakes or hydro-jetting to thoroughly clear the blockage and inspect for underlying issues. In Ottawa, basic drain clearing typically costs $150-$300, which is much less expensive than dealing with a completely blocked drain or water damage from an overflow.

For a thorough diagnosis and professional drain cleaning, request a quote from Ottawa Pro Plumbing - we can identify the exact cause and provide a lasting solution.

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