Even if bleach were partially effective, the risks outweigh any potential benefit.
If you'd like to try a DIY fix before calling a professional, let me know: What the sink is in (Kitchen vs. Bathroom)? Is it a slow drain or a total blockage ? Do you have standing water in the basin right now? DIY Basics - How to Unclog a Bathroom Sink | The Home Depot can bleach unclog a sink
Sodium hypochlorite breaks down into salt (NaCl) and water, but its reaction with organic matter produces chlorinated organic compounds (trihalomethanes), which are harmful to aquatic life and may be toxic in groundwater. Even if bleach were partially effective, the risks
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