When using hair unclogger liquids, it is essential to take safety precautions to avoid accidents and injuries:
| Plumbing Material | Compatibility | Failure Mechanism | | :--- | :--- | :--- | | | Good (up to 60°C) | Prolonged >80°C softens pipe; joint adhesive embrittlement | | ABS | Moderate | Stress cracking in high heat | | Cast Iron | Poor | NaOH reacts with iron oxide? Minimal; but NaOCl accelerates galvanic corrosion at joints | | Copper | Unsafe | NaOCl pitting corrosion; NaOH stress corrosion cracking | | Aluminum drains | Extremely unsafe | Violent hydrogen gas production (2Al + 2NaOH + 6H₂O → 2NaAl(OH)₄ + 3H₂↑) → explosion risk | | Enamel/porcelain | Safe | No reaction, but heat can craze old enamel | hair unclogger liquid