drain cleaner

This term refers to a broad category of products, ranging from caustic chemical liquids and gels to mechanical devices like plastic snakes or plungers. When referring to the chemical variety, the term carries a strong connotation of danger and toxicity, often necessitating safety warnings regarding skin contact or inhalation.

In a domestic context, it is typically used as a mass noun when referring to the substance itself (e.g., "too much drain cleaner"), but as a countable noun when referring to the physical product or tool (e.g., "a bottle of drain cleaner" or "two different drain cleaners").