The systematic approach to clearing a stubborn bathroom sink blockage
In short: When a bathroom sink backs up, most people reach for a plunger first. Plumbing expert Richard Trethewey explains why a methodical, step-by-step disassembly of the drain components is often the more effective way to clear the gunk.
The process begins by inspecting the pop-up assembly to ensure it is rising correctly at the drain line. Should the problem continue, take the unit apart by using an open-faced wrench to undo the primary drainage pipe's nut. Using a bucket to catch excess water is a critical precaution during this stage.
Once disassembled, you can manually scrape out gunk attached to the pop-up or the drain. For deeper obstructions, the guide suggests using a hair snare to fish out debris. The final resort for a persistent blockage is a drain snake, which is fed through the pipes and the p-trap to break up the obstruction.
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Sources
- Summary by Intellect · source: How to Unclog a Bathroom Sink | Ask This Old House
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