If you're concerned about the potential risks associated with caustic soda, consider these alternatives:

While this heat and chemical activity break down organic blockages, they simultaneously subject the surrounding plumbing to extreme chemical and thermal stress. Damage Profiles by Pipe Material

If a severe clog blocks the drain, the caustic soda solution will sit in one spot (usually the P-trap under the sink).

Can Caustic Soda Damage Pipes ~repack~ ✓ ❲ESSENTIAL❳

If you're concerned about the potential risks associated with caustic soda, consider these alternatives:

While this heat and chemical activity break down organic blockages, they simultaneously subject the surrounding plumbing to extreme chemical and thermal stress. Damage Profiles by Pipe Material

If a severe clog blocks the drain, the caustic soda solution will sit in one spot (usually the P-trap under the sink).