Printable maintenance checklist, frequency guide by restaurant type, 7 signs your trap needs service now, and how to pass a health inspection grease trap review. Provided by Ozark Grease Pros — NWA’s only licensed grease recycling facility.
Grease trap maintenance is one of the most commonly deferred tasks in a commercial kitchen — until it becomes an emergency. This checklist gives NWA restaurant managers a practical, printable reference for monthly maintenance, service scheduling, and health inspection preparation. Last updated: 2026.
Print this checklist and post it near the grease trap access point. Complete it monthly — or more frequently for high-frying kitchens on weekly cycles.
MONTHLY CHECKS — Complete every 30 days (or weekly for high-frying QSR kitchens)
Verify most recent service manifest is on file and dated within the required service interval
Check drain flow — all floor drains and sink drains flowing freely with no backup or slowdown
Check for odors — no persistent grease or sewer odor from kitchen drains or trap lid area
Visually inspect trap lid — lid is seated properly and sealed, no visible damage
Check service schedule — confirm next pump date is within the recommended frequency for your kitchen type
Confirm disposal facility — last manifest names an ADEQ-licensed disposal facility (not an unlicensed site)
Check grease near the trap — no visible grease accumulation around the trap lid or access area
QUARTERLY CHECKS — Complete every 90 days
Pull trap lid and visually assess fill level — floating grease + settled solids should be below 25% of liquid depth
Check baffle condition — inlet and outlet baffles intact, not corroded or damaged
Check inlet/outlet pipes — no partial blockage reducing effective trap capacity
Verify water seal is present — trap has adequate water level between pump-outs
Review pump frequency — is current schedule appropriate for actual kitchen output? Adjust if menu or volume has changed
Verify service records are retained — manifests for the past 1–3 years available for inspection
Pre-Inspection Check — Complete Before Any Health Inspection
Most recent signed service manifest is on file and immediately available — inspectors will ask
Manifest shows service within the required frequency for your restaurant type
Disposal facility on manifest is ADEQ-licensed (our Siloam Springs, AR facility qualifies)
Trap fill level is below 25% of liquid depth — pump immediately if approaching threshold
Interior walls and baffles are clean — not just pumped, but scrubbed (inspector can observe residue)
Trap lid is secured and accessible for inspection — nothing blocking access
No grease odor detectable in kitchen drain or trap lid area
Inlet/outlet pipes clear — no visible restriction
Water seal present — trap refilled to operating level after last service
Service frequency is consistent — not a one-time pump after a long gap
Trap approaching the 25% threshold or overdue for service?
Schedule a pump-and-clean service → or call 479-448-7755. Ozark Grease Pros serves all NWA cities with combined pump-and-clean on every call.
The right pumping frequency depends on three variables: trap size, kitchen output volume, and the type of cooking. Arkansas FOG regulations follow the 25% rule — pump before grease and solids combined reach 25% of trap liquid depth, regardless of how much time has elapsed. Use the table below as a starting frequency, then adjust based on your actual fill rate after the first service.
Restaurant Type | Trap Size | Recommended Frequency | Why |
QSR / fast food (high frying) | 500–1,000 gal | Monthly | Daily high-volume frying fills traps quickly. Bacteria establishes on trap walls within 3 weeks — monthly cleaning prevents the odor cycle. |
Pizza restaurant | 500–1,000 gal | Monthly–bi-monthly | High cooking oil and cheese fat output. Monitor fill rate — some pizza operations trend toward monthly. |
Casual dining / full-service | 750–1,500 gal | Bi-monthly | Moderate FOG output from a varied menu. Bi-monthly is the standard starting frequency. |
Fast-casual (burgers, wraps) | 500–1,000 gal | Monthly–bi-monthly | Depends on frying output. Burgers with significant frying trend toward monthly. Salad-heavy fast-casual can be bi-monthly. |
Mexican / high-fat cuisine | 750–1,500 gal | Monthly–bi-monthly | Lard, cheese, and high-fat cooking produce significant FOG. Monitor fill rate closely first month. |
Fine dining / low frying | 500–1,000 gal | Quarterly | Lower daily FOG output from sauce-based and low-frying cooking. Confirm with fill rate assessment on first service. |
Café / coffee shop | 250–500 gal | Quarterly | Minimal frying. Milk fats and pastry grease generate moderate FOG. Quarterly standard for most café operations. |
Hospital / institutional | 1,500–2,000+ gal | Monthly–bi-monthly | High consistent volume from daily cafeteria operations. Healthcare compliance standards may require more frequent documentation. |
Grand Lake / seasonal | Any | Monthly (peak season) | May–September peak season demands monthly service. Winter: quarterly or on-demand. Pre-season assessment pump recommended in April. |
New restaurant | Any | Assessment first | First visit: confirm trap sizing and establish baseline fill rate before setting the permanent schedule. |
The 25% rule — Arkansas FOG compliance standard: A grease trap must be serviced when the combined depth of floating grease and settled solids reaches 25% of the trap’s total liquid depth. This threshold is enforced by ADEQ and all NWA municipal water utilities. Your service schedule must be frequent enough to prevent the trap from reaching 25% between service visits. Full FOG compliance guide →. |
Do not wait for your scheduled service date if any of these warning signs are present. Each one indicates a trap that is approaching or past the compliance threshold — or worse, already affecting your kitchen and sewer system.
WARNING SIGNS — Schedule emergency service immediately if any of these are present
Persistent drain odor in the kitchen — persistent grease or sewer smell from any drain in the kitchen, especially near the trap access point. Odor means bacterial colonization is active and the trap wall film is generating gas.
Slow-draining floor drains or sinks — FOG accumulation in the trap or drain line is restricting flow. Do not use drain cleaners — they can push FOG into the sewer line. Call for service.
Grease backing up into sink drains — visible grease appearing in sink drain basins indicates trap is at or over capacity. Immediate service required.
More than 6 weeks since last service (high-frying kitchen) — any QSR, fast food, or high-frying kitchen that has gone 6+ weeks without service is statistically at or near the 25% compliance threshold. Do not wait for the next scheduled date.
More than 4 months since last service (any kitchen) — even low-volume kitchens should not exceed a quarterly service interval. A trap that hasn't been serviced in 4 months is a compliance risk.
Health inspection scheduled within 2 weeks — if your most recent manifest is more than 30–60 days old and a health inspection is approaching, schedule pre-inspection service immediately. Inspectors check manifest dates.
Any sign of grease in the sewer cleanout — grease visible in the exterior sewer cleanout or floor drain cleanout indicates FOG is escaping the trap. This is an imminent SSO risk and a serious compliance violation.
Emergency or urgent grease trap service in NWA: Call 479-448-7755 |
Health inspectors in Benton County and Washington County assess grease trap compliance as part of routine food service establishment inspections. Here is exactly what they look for — and what you need to have ready:
DOCUMENTATION — Have this ready before the inspector arrives
Most recent signed service manifest — date, gallons, service company, ADEQ-licensed disposal facility address
Service history — manifests for the past 1–3 years (city utilities may request multi-year history
Confirmation that disposal facility is licensed — our address (930 East Jefferson, Siloam Springs, AR 72761) is ADEQ-licensed
Service frequency consistent with kitchen output — a single recent pump after a long gap is a red flag
PHYSICAL CONDITION — What inspectors observe on-site
Fill level — grease + solids combined must be below 25% of liquid depth at time of inspection
Interior walls and baffles — clean walls indicate combined pump-and-clean service; heavy film indicates pump-only service that left bacteria and FOG deposits
Trap lid — properly seated, sealed, accessible, undamaged
No odor — persistent grease or sewer odor from trap or drain area is a deficiency finding
Inlet/outlet pipes — no visible blockage or restriction
Water seal — adequate water level in trap (water seal prevents sewer gas from entering kitchen)
Trap not bypassed — confirm drain system routes to the trap, not around it
Finding | Trigger Condition | Common Resolution |
FOG documentation deficiency | No manifest on file, undated manifest, or manifest naming unlicensed disposal site | Provide compliant manifest; confirm licensed disposal facility |
Fill level violation | Grease + solids exceed 25% of liquid depth at inspection | Immediate pump-out required; re-inspection to confirm compliance |
Interior condition deficiency | Visible grease film on trap walls and baffles (pump-only service residue) | Full interior cleaning — not just pump-out |
Service frequency concern | Service dates showing irregular or infrequent service for kitchen output type | Establish documented regular service schedule |
Odor / sewer gas | Persistent kitchen drain odor attributable to grease trap condition | Full pump-and-clean; water refill; possible drain line inspection |
Access obstruction | Trap lid not accessible for inspection | Clear access; ensure lid is accessible per utility requirements |
The most common inspection finding that surprises restaurant operators: pump-only service is not the same as compliant maintenance. An inspector can observe the difference between a trap that has been pumped (liquid removed) and a trap that has been pumped and cleaned (walls and baffles scrubbed). Residual FOG film on trap walls is a visible condition finding even when the liquid level is below 25%. Ozark Grease Pros provides combined pump-and-clean service on every call — not pump-only.
Not all grease trap service is created equal. Many operators don’t realize that pump-only service — removing the liquid without cleaning the walls — leaves the bacterial film that generates odors and can still trigger inspection findings. Here is what a complete Ozark Grease Pros maintenance visit provides:
Service Component | What This Means | Why It Matters for Compliance |
Full pump-out | All liquid waste removed — gallons documented on signed manifest | Volume record satisfies City water utility and ADEQ manifest requirements |
Interior wall scrubbing | Walls and lid underside scrubbed to remove FOG film and bacterial deposits | Eliminates odor source; clean walls satisfy inspection condition standard |
Baffle clearing and inspection | Inlet and outlet baffles cleared of deposits; condition noted on service record | Baffle condition is an inspection item; damaged baffles must be reported |
Residual solids removal | All material dislodged during scrubbing removed — not left to generate odor | Prevents odor between cycles; clean trap interior |
Inlet/outlet pipe check | Partial blockages at inlet cleared; outlet checked for restriction | Flow restriction check; prevents accelerated fill from inlet blockage |
Water refill | Trap refilled to operating level after pump-out | Maintains water seal against sewer gas; required for compliant condition |
Signed manifest | Date, gallons, your address, our ADEQ-licensed Siloam Springs facility (930 East Jefferson, Siloam Springs, AR 72761), technician signature | The document inspectors request; your FOG compliance record |
Monthly for QSR and high-frying operations. Bi-monthly for casual dining with moderate FOG output. Quarterly for fine dining and low-frying menus. Arkansas regulations follow the 25% rule — pump before grease and solids reach 25% of trap liquid depth, regardless of time elapsed.
A grease trap maintenance checklist includes: (1) Verify service manifest on file from last pump-out. (2) Check trap fill level — service if grease and solids exceed 25% of liquid depth. (3) Confirm no drain odors. (4) Check inlet/outlet pipes for blockage. (5) Verify lid is sealed. (6) Confirm disposal on manifest is ADEQ-licensed. (7) Confirm service frequency matches kitchen output. (8) Retain historical manifests 1–3 years.
Persistent drain odors in the kitchen, slow-draining floor drains or sinks, grease backing up into drains, more than 6 weeks since last service for a high-frying kitchen, more than 4 months since last service for any kitchen, a health inspection scheduled within 2 weeks with an outdated manifest, or any sign of grease in the sewer cleanout.
Have your most recent signed service manifest available — inspectors will ask. Confirm trap fill level is below 25% of liquid depth. Ensure interior walls and baffles are clean — not just pumped. Verify lid is secured and accessible. Confirm disposal on manifest is at an ADEQ-licensed facility. Keep all historical service records available.
Monthly combined pump-and-clean. At high frying volume, bacterial colonies establish on trap walls within three weeks. Monthly cleaning prevents the odor buildup that pump-only service leaves behind.
A complete visit includes: full pump-out with gallons documented on signed manifest, interior wall and baffle scrubbing, residual solids removal, inlet/outlet pipe check, water refill, and a signed manifest naming the ADEQ-licensed disposal destination. This is combined pump-and-clean service — not pump-only.
Combined pump-and-clean · Signed manifest · ADEQ-licensed disposal · All NWA cities
