A: No. Bleach (Sodium Hypochlorite) is a disinfectant; it kills germs but does not dissolve hair or fat. Caustic soda (Sodium Hydroxide) is a degreaser. They are different chemicals.
| Pipe Material | Compatibility | Reason | |---------------|---------------|--------| | PVC / ABS | | Heat can soften joints (max temp ~60°C / 140°F). Limit exposure to 15 min. | | Old cast iron | Not recommended | Can corrode existing rust pits; may cause leaks. | | Aluminum | Never | Dissolves aluminum violently, producing hydrogen gas (explosion risk). | | Copper / Brass | Limited | Minor etching over time; occasional use only. | | Modern HDPE / Polypropylene | Safe | Chemically resistant. | caustic soda unblocking drains
Dissolving NaOH in water releases significant heat (approx. 44 kJ/mol). This heat softens waxes, melts soap scum, and accelerates the chemical reactions. They are different chemicals
