Rules & Regulations of the State of Tennessee
Title 0400 - Environment and Conservation
Subtitle 0400-48 - Water Resources (Groundwater Protection)
Chapter 0400-48-01 - Regulations To Govern Subsurface Sewage Disposal Systems (Transferred from 1200-01-06)
Section 0400-48-01-.14 - GREASE TRAPS

(1) Grease Traps in Commercial Buildings - Kitchen drain lines from institutions, hotels, restaurants, schools, lunchrooms and other establishments from which flow a relatively high volume of grease may be discharged to a grease trap. Grease trap effluent shall also be treated in the septic tank before being discharged into the disposal field.

(2) Grease traps shall be constructed to insure that both the inlet and outlet are properly submerged to trap grease and that the distance between inlet and outlet is sufficient to allow separation of the grease so that grease solids will not escape through the outlet.

(3) Grease traps shall be vented so they will not become airbound. A cover shall be provided and located so as to be conveniently accessible for servicing and cleaning. The cover shall be designed to prevent odor and exclude insects and vermin.

(4) Garbage Grinder Waste - Waste from garbage grinders shall not pass through any grease trap before being discharged to a septic tank.

(5) Sizing the Grease Trap - Proper sizing of the grease trap should be based on efficiency ratings and flow capacities, which are determined by the number and kinds of sinks or fixtures discharging into the trap.