Improve environmental sanitation in floor drains with Pathways Quaternary Solid Drain Sanitizer. This patented, water activated, time released detergent-sanitizer helps emulsify soil deposits 24 hours a day to reducebuild-up between cleanings. The 8" ring design does not obstruct water drainage. Use in floor drains, troughs, pits, and other areas where wet conditions favor microorganism growth and sanitation concerns. Green. 24 rings/case.