It gets put in a sinkhole

• Dual Force Foamer maker
• Clogged-sink opener
• Some bathroom crystals
• Brand name that has a macron over the third letter
• Brand used in pipes
• Liquid Plumr rival
• Brand with "churning power"
• Clog loosener

Wikipedia Word definitions in Wikipedia
Drano (or Drāno) is a drain cleaner product manufactured by S. C. Johnson & Son .