Under-the-Sink Traps

Inground grease interceptors and under-the-sink traps are designed to prevent grease, oil, solids and other debris from entering the waste stream, where it becomes a problem by clogging sewers and disrupting the water flow in the system. They capture those wastes and contain them until a transporter, pumper service or the food service establishment (FSE) can properly remove them. Both interceptors and traps are inspected annually by a Commercial Pretreatment Inspector for proper maintenance. The following are suggestions for under-the-sink traps:

  • Traps must be maintained and cleaned on weekly, monthly or quarterly schedules as determined by the Commercial Pretreatment Inspector. (drop down maintenance)
  • Train all staff on the location, purpose, function and proper maintenance schedule.  All staff on FSE site must be able to open trap with proper tools for Pretreatment Inspector.
  • Backups, odors and drainage problems are all signs that your trap is not functioning properly.  Proper installation of screens on all kitchen drains is required.

PLEASE NOTE:  For new construction or remodeling, a Food Service Establishment (FSE) must contact a Commercial Pretreatment Inspector for sizing assistance.

Proper Cleaning Techniques for Traps

  • Complete pump out by approved Transporter.
  • Complete pump out by FSE personnel with shop vac or other techniques. Dispose of contents in trash. Contact Commercial Pretreatment Inspector for more information.