Unclogging a sink without a plunger is achievable through a tiered approach. Mechanical extraction via a wire hook offers the highest success rate for solid clogs, while chemical dissolution (baking soda and vinegar) provides a non-invasive solution for organic build-up. The P-trap cleanout serves as the final, definitive solution when obstruction removal is otherwise unsuccessful.
Only use this for metal pipes. Boiling water can soften PVC joints. 2. Baking Soda and Vinegar Volcano unclog sink without plunger