Grease Trap & Grease Interceptor Plan Check

Grease Trap and Grease Interceptor Plan Check

 As one of the requirements prior to the issuance of a Plumbing Permit by Long Beach Development Services (formerly Building and Planning Department), a plumbing permit applicant must go through plan review with the Long Beach Water Department (LBWD) for sewer protection requirement(s). All restaurants, commercial kitchens and facilities where food is prepared and served to the public are required to comply with this requirement(s).

Minimum Grease Trap/Interceptor Plan Check Requirements

  • Full payment. Please make your check payable to Long Beach Water Department. For applicable fees, see  LBWD Rules & Regulations (View Appendix B, 2B, Page 81)
  •  Required number of set of your plumbing plans with establishment name and address shown for LBWD approval, minimum size of 11”x17”. LBWD will scan a copy for our records.
  • Show all kitchen equipment and fixture schedule specifying which fixtures will drain to the grease device. Garbage disposals and/or dishwashers shall not discharge or connect to the grease device
  • Show proposed installation of flow control device and connection of vent to roof per manufacturer’s installation instructions.
  • Dishwasher pre‐rinse must drain to the interceptor
  • The sizing calculation for your grease device shall be included on your plan and shall comply with the California Plumbing Code. The minimum size for smaller
    under‐the‐sink grease trap shall be 20 gpm. The size for grease interceptors located outside the buildings will be based on the sizing calculation. Grease traps must be listed by the International Associate of Plumbing and Mechanical Officials (IAPMO).
  • Your plan shall contain the information for the proposed grease device including the manufacturer name, make, model number, size, and flow capacity. A copy of the grease device specifications shall be printed on your plan
  • Your plan shall show and label the kitchen equipment, fixtures, piping, and the proposed grease device.
  • Your plan shall show the grease waste lines marked as “GW” and sewer lines marked as “S”
  • Approval of the proposed location by the Long Beach Health Department is also required

Lead Time

The typical processing time for your Grease Trap & Grease Interceptor plan check request is approximately 7-10 business days.

Please submit your plumbing plans that meet the requirements listed hereon through LBWD’s online portal, Laserfiche, at the following link:

Grease Trap/Interceptor Plan

Engineering Development Front Desk Hours

The Engineering Development front counter is open for walk-ins during regular business hours Monday – Friday, 8:00 a.m. to Noon and from 1:00 p.m. to 4:30 p.m.

Phone: 562.570.2419



For any existing grease devices that will be utilized after a renovation or for a new facility or business, an inspection by LBWD is required. The device must be empty and clean prior to arrival of the inspector. Please call (562) 570‐2419 to make an inspection appointment.

For any questions related to the Grease Trap/Interceptor review process, please contact us at:

Call: (562) 570-2419

[bws_pdfprint display=’print’]


Water & Sewer System Design Guidelines