The terms ‘grease trap’ and ‘grease interceptor’ are often used interchangeably — but they describe two different types of FOG management systems with distinct size ranges, installation types, and service requirements. Understanding the difference matters because the wrong service approach for your specific system produces an incomplete job and a compliance record that may not hold up under inspection.
Feature | Grease Trap vs. Grease Interceptor |
System Type | Grease Trap: Small to mid-size passive separation unit — typically under-sink or nearby, serving a single kitchen area.Grease Interceptor: Large in-ground passive separation system — installed outside or below the building, serving an entire facility’s drain output. |
Typical Size Range | Grease Trap: 100 to 1,000 gallons (most under-sink units: 250–500 gal).Grease Interceptor: 750 to 5,000+ gallons (some large commercial operations run 2,000–3,000 gal interceptors). |
Installation Location | Grease Trap: Inside the building — under the kitchen sink or in a floor-level access box.Grease Interceptor: Outside the building or underground — access via exterior ground-level lid, often requiring a truck with longer vacuum hose reach. |
Who Typically Has One | Grease Trap: Standard restaurants, quick-service, cafeterias — most NWA food service operators.Grease Interceptor: High-volume QSR groups, institutional cafeterias, hotel kitchens, food processing-adjacent operations, facilities required by code to install interceptor-sized systems. |
Pump Frequency | Grease Trap: Monthly to quarterly depending on FOG output.Grease Interceptor: Quarterly to semi-annually for most operations — larger capacity means slower percentage fill, but volume per service is much higher. |
Service Complexity | Grease Trap: Standard access — most service completed in 30–60 min.Grease Interceptor: Larger hose reach, higher volume, potential need for multiple vacuum truck loads on very large systems. Service time 60–120+ minutes. |
Operator Type | Why They Need Interceptor Service |
High-volume QSR with multiple fryers (McDonald’s, Chick-fil-A, Raising Cane’s) | High daily FOG output from frying operations often exceeds what a standard grease trap can manage — code or operational need dictates interceptor-sized system. |
Hotel and hospitality kitchen operations | Full-service hotel kitchens serving breakfast, banquet, and restaurant operations generate sustained FOG across multiple prep and service periods — interceptors standard for this size. |
Institutional cafeteria (university, hospital, corporate campus) | High daily meal counts generate consistent FOG. Interceptors sized for volume and often required by facility code. University of Arkansas area operators are a key NWA segment. |
Grocery deli and prepared foods operations | Large-format grocery delis with active frying and hot food programs operate at volumes that often require interceptor-scale FOG management. |
Multi-tenant food court / food hall | Shared FOG management infrastructure for multi-tenant food operations often centralizes waste flow into an interceptor serving multiple kitchen lines. |
Food truck commissary with shared facilities | Commissary kitchens with multiple users sharing drain infrastructure may require interceptor-level capacity. |
The core process is the same — vacuum removal of FOG waste, manifest documentation, compliant disposal at our Siloam Springs facility. But grease interceptor service involves operational differences that affect scheduling, service time, and logistics:
Operational differences for interceptor vs. standard trap service: Access & Location: Interceptors are typically exterior, underground systems accessed via a ground-level lid. Service requires positioning the vacuum truck for longer hose reach — usually straightforward in parking lot or exterior access areas, but worth confirming during initial setup. Volume per Service: A 2,000-gallon interceptor at 25% capacity contains ~500 gallons per pump — significantly more than a typical under-sink trap. Very large interceptors (3,000+ gallons) may require a second vacuum truck load on a full pump cycle. Service Time: Standard trap service: 30–60 minutes. Interceptor service: 60–120+ minutes depending on size, access, and accumulation level. Pump Frequency: The larger capacity of an interceptor means less frequent pumping — typically quarterly rather than monthly for most operators. But the 25% capacity rule still applies: if your interceptor is filling faster than quarterly, frequency needs to increase. Documentation: Same manifest documentation as standard trap service — date, location, gallons removed, disposal destination (Siloam Springs facility), technician signature. Same compliance record for health inspections. Combined Cleaning: Interior cleaning on large interceptors is recommended but may require additional service time. Discuss cleaning cycle with us when setting up your maintenance program. |
Interceptor Size | Typical Pump Volume(25% fill) | Estimated Cost(@ ~$0.40/gal) | Typical Frequency | Best For |
750 gallons | ~188 gal | ~$75 | Quarterly | Mid-size casual dining |
1,000 gallons | ~250 gal | ~$100 | Quarterly | High-volume casual dining / QSR |
1,500 gallons | ~375 gal | ~$150 | Quarterly | Institutional cafeteria |
2,000 gallons | ~500 gal | ~$200 | Quarterly | Large QSR / hotel kitchen |
3,000 gallons | ~750 gal | ~$300 | Semi-annually | Large institutional / multi-tenant |
5,000 gallons | ~1,250 gal | ~$500 | Semi-annually | Large commercial facility |
Costs above are ceiling estimates based on full 25% fill. Actual billing is per manifest volume. See our full grease trap cost guide for complete NWA pricing data →
Grease interceptors are subject to the same Arkansas ADEQ pre-treatment standards and NWA municipal FOG ordinances as standard grease traps — but the stakes are typically higher. Larger facilities with interceptors tend to generate more FOG output, which means a non-compliant interceptor creates a proportionally larger environmental and regulatory risk than an overdue under-sink trap.
In Fayetteville, Springdale, Rogers, and Bentonville, FOG compliance checks for large commercial food service facilities often include interceptor inspection as a specific item. The manifest record for interceptor service — documenting gallons removed, licensed disposal facility, and service frequency — is the same critical document that health inspectors request for standard trap accounts.
Ozark Grease Pros interceptor compliance documentation:
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High-volume commercial food service accounts — the type most likely to operate grease interceptors — face a specific challenge in NWA: there are very few service providers with the equipment capacity and licensed disposal infrastructure to handle large-volume interceptor jobs correctly. Most general pumping services are equipped and priced for standard residential-scale or small restaurant traps. Large commercial interceptors represent a different scope.
Ozark Grease Pros is built for commercial volume. Our vacuum truck equipment handles the larger extraction volumes that interceptor service requires, and every load — regardless of volume — goes to our licensed grease processing facility in Siloam Springs for compliant disposal. That facility infrastructure is what allows us to serve high-volume commercial accounts with the same documentation standards as our standard restaurant clients.
For B2B pumping companies who service large commercial interceptors in NWA: if you’re hauling interceptor waste to Tulsa, our facility is significantly closer for most of the service area — and the tipping fee ($0.15/gal) makes the economics work. See B2B disposal facility details →
We service grease interceptors across the full NWA corridor — Fayetteville, Springdale, Bentonville, Rogers, Siloam Springs, and surrounding communities. Multi-location food service groups with interceptors at multiple NWA facilities can consolidate service under a single account.
A grease interceptor is a large passive separation system — typically 750 gallons or more — installed underground or outside a building to capture fats, oils, and grease (FOG) before they enter the municipal sewer. Unlike standard under-sink grease traps (typically 250–500 gallons), grease interceptors serve an entire facility’s drain output and are required by code for high-volume food service operations in most NWA municipalities.
Grease traps are small to mid-size units (100–1,000 gallons) typically installed inside the building, under or near kitchen sinks. Grease interceptors are larger systems (750–5,000+ gallons) installed underground outside the building, serving the total FOG output of an entire facility. Both separate FOG from wastewater, but they differ in size, installation location, access method, service frequency, and the volume per service call.
Most grease interceptors are serviced quarterly — every 90 days — though the correct interval depends on the interceptor’s size and the facility’s daily FOG output. The standard trigger is when combined grease and solids reach 25% of total interceptor capacity. High-volume operations may find they need more frequent service; lower-volume operations may be able to extend to semi-annual cycles.
Ozark Grease Pros prices grease interceptor pumping on the same per-gallon basis as standard trap service (~$0.40/gal), billed against the signed manifest volume. A 1,500-gallon interceptor at 25% capacity (375 gallons pumped) costs approximately $150 per service call. Larger interceptors cost more per call but have longer intervals between service. See our cost guide for detailed size-by-size estimates.
Yes. Our vacuum equipment is sized for commercial-volume grease interceptor service, and all waste — regardless of volume — is transported to our licensed Siloam Springs processing facility. Very large interceptors (3,000+ gallons) that require multiple truck loads are serviced across multiple cycles. We’ll assess your interceptor and advise on service logistics during the initial consultation.
Yes — the same manifest documentation required for standard grease trap pumping applies to interceptor service. Date, facility address, gallons removed, disposal destination (our licensed Siloam Springs facility), and technician signature. This document is your FOG compliance record for health inspections and municipal ordinance compliance verification.
Grease Trap Pumping
Scheduled Maintenance Programs
FOG Compliance Guide
