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PCWASA (770) 487-7993

1127 Highway 74 South • Peachtree City, GA 30269

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Grease Trap Approval

All grease traps/interceptors, oil-water separators, and sand interceptors must be designed in accordance with the PCWASA Sanitary Sewer Specifications and Standards. Plans and sizing calculations of the proposed grease trap/interceptor, oil-water separator, or sand interceptor must be submitted to the PCWASA Fats, Oils and Grease (FOG) Program Coordinator for approval.

Any FOG generating establishment (food service, hair salon, pet grooming, car wash, automotive maintenance, etc.) {new or existing} are required to submit two complete sets of plans to PCWASA. One set of plans for the PCWASA Construction Coordinator and the other set of plans for the PCWASA FOG Program Coordinator.

Once the plans have been approved, a Letter of Approval will be issued to the Developer. Upon completion of installation, the Developer must contact the FOG Program Coordinator to request an inspection of the installed grease trap/interceptor, oil-water separator, or sand interceptor. A Certificate of Approval will be issued by the FOG Program Coordinator after the grease trap/interceptor, oil-water sepator, or sand interceptor passes the inspection.

The Certificate of Approval must be submitted to the PCWASA Construction Coordinator for issuance of the Sanitary Sewer Permit, as well as to the City of Peachtree City for the Building Permit.

Listed below are associated documentation used in the grease, oil, and sand interceptor plan review & approval process:

PCWASA Grease Interceptor Requirements Sheet

PCWASA Oil-Water Separator/Sand Interceptor Requirements Sheet

PCWASA Ordinance - Grease Trap Section Sheet

PCWASA Detail 112 Grease Interceptor Specification Sheet (Revised 01-26-2017) - For Outside Grease Interceptor (minimum 1500 gallon capacity)

Grease Interceptor Manufacturers that build according to the PCWASA Grease Interceptor Detail 112 Sheet

As aforementioned above, the PCWASA Grease Trap Approval Process consists of two steps:

1. Grease Trap Design Approval Process - The following items are required to receive a PCWASA Grease Trap Design Approval Letter:

  • Two complete sets of plans
  • Grease trap sizing calculations
  • Grease trap manufacturer's specification sheet of the grease trap proposed for installation

Once the aforementioned items have been received by the PCWASA FOG Program Coordinator. Then, a PCWASA Grease Trap Design Approval Letter will be submitted to either the building contractor and/or the facility owner/representative. 

2. Grease Trap Installation Approval Process - Consists of two inspections:

  • Preliminary Installation Inspection - Inspection of visible plumbing lines within foundation for grease trap/interceptor connection and inspection of grease trap/interceptor installation (if required) prior to covering with dirt, sand, and/or concrete. 

  • Final Installation Inspection - Inspection of kitchen wastewater piping connection to grease trap/interceptor; complete inspection of grease trap/interceptor installation (if required) including manhole lids, vertical tees, horizontal tees, cleanout caps, etc. 

After the Grease Trap Installation Approval Process has been completed, a PCWASA Grease Trap Certificate of Approval will be submitted to either the building contractor or the facility owner/representative. 

Grease, Oil, and Sand Interceptor Sizing Information

PCWASA Sanitary Sewer Specifications and Standards Sheet {Sand and Oil/Grease Interceptors Section}

2012 Uniform Plumbing Code - Chapter 7 {Sanitary Drainage} Section 1 - Please see Table 702.1 {Drainage Fixture Unit Values (DFU)} on Page 111 to assist with Outdoor Grease, Oil and Sand Interceptor Sizing.

2012 Uniform Plumbing Code - Chapter 7 {Sanitary Drainage} Section 2 

2012 Uniform Plumbing Code - Chapter 10 {Traps and Interceptors} - Please see Table 1014.2.1 and Example 1014.2.1 on Page 134 for Inside Grease Trap Sizing Information. Please see Table 1014.3.6 and Example 1014.3.6 on Pages 135 for Outdoor Grease Interceptor Sizing Information.

PCWASA 15-Gallon Per Wastewater Seat Grease Interceptor Sizing Calculation Example (Based on PCWASA 15 Gallons of Wastewater Per Seat Requirement from the PCWASA Sanitary Sewer Spefications and Standards Manual) - Use this grease interceptor calculation sizing example for restaurants that have inside and outside dining room area seating. There is also a grease interceptor sizing calculation example for hospitals, nursing homes, and other types of commercial kitchens with varied seating.

Grease Trap Sizing Information for Inside Grease Traps Only

Standard PDI-G 101 Revised April 2015 - Testing and Rating Procedure for Hydro Mechanical Grease Interceptors with Appendix of Installation and Maintenance - This grease trap sizing information is for facilities that have no restaurant dining room seating (depending on type of restaurant or other type of food service preparation facility). Also, helpful for hair salon and pet grooming salon grease trap sizing. Please refer to pages 14-15 (Table 1) and pages 16-18 (Sizing for Grease Interceptors) on how to properly size an inside grease trap.

For more information concerning the PCWASA grease trap approval process or grease trap sizing questions, please contact Xavier Davis, GIS Specialist / FOG Program Coordinator at (770) 487-7993 or at XavierD@pcwasa.org.