Commercial plumbing · Restaurant TI

Grease Trap & Grease Interceptor Installation in Los Angeles & Orange County

INVICTA installs in-ground grease interceptors and indoor grease traps for restaurants, from permits and excavation through the crane set, kitchen tie-in and final inspection.

Get a Free Restaurant TI Report How we install

What we install

The complete grease system, not just the tank.

A grease interceptor only passes inspection when the drains, venting, access and site work are right too. We handle all of it.

Gravity grease interceptors

In-ground, multi-compartment precast concrete tanks installed outside the kitchen, with access risers and traffic-rated covers to grade.

Indoor grease traps

Hydromechanical units under or near sinks where the agency allows them, sized to the fixtures they serve.

Kitchen drain tie-ins

Floor sinks, prep and pot sinks, mop sinks and floor drains re-routed to the grease line.

Permits & agency approvals

Plans and submittals for the building department, health department and your sewer agency’s FOG program.

Excavation & crane set

Trenching, shoring, crane coordination and setting the interceptor level at the right depth.

Backfill, paving & ADA

Compaction, asphalt or concrete patching, striping and accessible parking restored before you reopen.

How we install

Six steps from the dig to back-in-business.

Photos from our grease interceptor installation at Miches de la Baja in La Habra.

  1. Excavation during the Miches de la Baja grease interceptor installation
    01

    Excavation

    Trenching from the kitchen to the interceptor location and down to the sewer connection.

  2. Crane set during the Miches de la Baja grease interceptor installation
    02

    Crane set

    The precast concrete interceptor is lifted off the truck and lowered into the pit.

  3. Set and level during the Miches de la Baja grease interceptor installation
    03

    Set & level

    Set on a level base with the inlet, outlet and access risers lined up to finished grade.

  4. Inlet, outlet and baffles during the Miches de la Baja grease interceptor installation
    04

    Inlet, outlet & baffles

    Inlet and outlet fittings connected so grease stays in the tank and clean water flows on.

  5. Kitchen tie-in during the Miches de la Baja grease interceptor installation
    05

    Kitchen tie-in

    Kitchen floor and sink drains opened up and re-routed to the new grease line.

  6. Backfill and restore during the Miches de la Baja grease interceptor installation
    06

    Backfill & restore

    Backfilled, compacted and the parking lot surface put back so the restaurant can reopen.

Do you need one?

When Southern California restaurants are required to install a grease interceptor.

Rules vary by city and sewer agency. We confirm your exact requirements in your free report.

Orange County (OC San)

  • Food service establishments must pretreat kitchen wastewater with a grease interceptor and hold a FOG Wastewater Discharge Permit.
  • Waivers are not issued for new restaurants, major remodels or changes in operation.
  • Interceptors are 750 to 1,500 gallons with two compartments and manholes to grade.

Sources: OC San FOG program · OC San design guidelines

Los Angeles County (Public Works)

  • A pretreatment device is required for new and existing food service establishments whose grease could cause sewer stoppages.
  • Triggers include 150+ seats, grills, fryers or woks, heavy take-out or drive-thru, and undersized or flat sewers.
  • Interceptors are sized by the California Plumbing Code, 750 to 1,500 gallons for restaurants.

Source: LA County Public Works restaurant pretreatment guidelines

Miches de la Baja · La Habra, CA

Recent install · La Habra, CA

Miches de la Baja grease interceptor

A new precast grease interceptor for a La Habra restaurant on Harbor Blvd, installed and tied into the kitchen with the parking lot restored.

See the project

FAQ

Grease interceptor questions, answered.

Ask us about your restaurant
What is the difference between a grease trap and a grease interceptor?
A grease interceptor (gravity grease interceptor) is a large, multi-compartment tank installed underground outside the building, usually precast concrete. A grease trap (hydromechanical grease interceptor) is a smaller unit generally installed indoors near a sink. OC Health Care Agency describes both types.
Does my restaurant need a grease interceptor?
Most likely, if you cook. In Orange County, OC San requires food service establishments to pretreat with grease interceptors, and waivers are not issued for newly built restaurants, major remodels or changes in operation (OC San). In areas covered by LA County Public Works, a pretreatment device is required where kitchen grease could cause sewer stoppages, with criteria like seating capacity, fryers and grills, take-out volume and sewer conditions (LA County Public Works). Your city or sewer agency makes the final call — we confirm it in your feasibility report.
What size grease interceptor do I need?
Sizing follows the California Plumbing Code and your agency’s rules. LA County Public Works and OC San both set a 750-gallon minimum and a 1,500-gallon maximum for restaurants unless the agency authorizes otherwise (LA County, OC San). We size it from your fixtures and kitchen equipment.
Who approves a grease interceptor installation?
Usually the city building department, the county health department and the sewer agency — for example LA County Public Works Industrial Waste or OC San’s FOG program. INVICTA prepares and submits the plans and coordinates the inspections.
How often does a grease interceptor have to be pumped?
OC San requires a full pump-out before grease and solids reach 25% of the tank’s liquid depth, and at least every 6 months (OC San). Other agencies set their own schedules. We place risers and covers so pumping trucks can reach them easily.
Can you keep my restaurant open during the work?
We plan the dig, crane set and kitchen tie-in with you to keep closures as short as possible, and we restore the parking lot or walkway before you reopen.
Do you do the rest of the restaurant build-out too?
Yes. INVICTA handles complete restaurant tenant improvements: kitchens, plumbing, ADA restrooms, storefronts and change-of-use approvals, all under one contract.

Service area

Restaurants across LA County & Orange County.

Los Angeles County

  • Long Beach
  • Lakewood
  • Cerritos
  • Downey
  • Norwalk
  • Bellflower
  • Paramount
  • Whittier
  • La Mirada
  • Santa Fe Springs
  • Pico Rivera
  • Torrance
  • Carson
  • Compton
  • Los Angeles

Orange County

  • La Habra
  • Fullerton
  • Brea
  • Buena Park
  • Anaheim
  • Cypress
  • Los Alamitos
  • Garden Grove
  • Westminster
  • Santa Ana
  • Orange
  • Huntington Beach
  • Costa Mesa
  • Irvine

Don’t see your city? We work throughout Southern California — ask us.

Grease interceptor installation

Need a grease interceptor? Start with a free report.

Tell us about your space. We’ll walk the site, check what your city, health department and sewer agency will require, and send a written plan with scope, approvals and a budget range — free.

  • Grease interceptor pathWhere it can go, how kitchen drains get there, and what the sewer agency needs
  • Permits & approvalsBuilding, health department and FOG permits mapped out up front
  • ADA & path of travelRestrooms, parking and entries that trigger with a remodel
  • Budget & scheduleA realistic range and a plan to limit time closed

Free · No obligation

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