Cleaning Drains Caustic Soda _best_ -

: These use bacteria or enzymes to eat away at organic matter over time and are much safer for pipes and the environment.

: While often used in plastic pipes, caustic soda can generate intense heat that may warp PVC or damage older metal plumbing and seals. Potential Drawbacks cleaning drains caustic soda

He shone a flashlight down the grate. The pipe walls looked clean, slick, and dark. The smell of caustic soda lingered, sharp and clean, scrubbing the mustiness from the basement air. : These use bacteria or enzymes to eat