There is no single verified grease trap pumping interval that suits every commercial kitchen across Ontario. A defensible schedule combines applicable municipal requirements with the trap’s condition, kitchen volume, menu, grease load, seasonal demand, warning signs, and documented service history.
The best approach is to control grease at the source every shift, inspect conditions regularly, arrange professional pumping before capacity or flow problems develop, and adjust the interval when records show that your kitchen is loading the trap faster or slower than expected.
Why There Is No Single Ontario Grease Trap Pumping Schedule
Ontario’s food-premises regulation sets a general sanitation expectation: food premises must be operated to prevent contamination and protect health, while equipment and utensils must be kept sanitary and cleaned as often as necessary. That principle supports regular maintenance, but it does not establish one pumping interval for every grease trap or interceptor. Ontario Regulation 493/17 should be read alongside the requirements that apply in the municipality where your kitchen operates.
Sewer authorities may consider factors such as interceptor design, discharge conditions, grease and solids accumulation, access, and service records. A small café with limited frying may load a trap differently from a busy quick-service restaurant, hotel kitchen, institutional facility, or catering operation.
Before setting a recurring date, review the grease trap cleaning requirements relevant to your location, then use your own observations and service records to confirm whether the planned interval is appropriate.
How to Set a Grease Trap Pumping Schedule
A useful schedule is not simply a date copied from another restaurant. Build it in stages so the frequency reflects both external requirements and the way your kitchen actually operates.
1. Identify the trap and applicable requirements
Confirm whether you are maintaining an under-sink grease trap, a floor-level unit, an outdoor interceptor, or more than one device. Record which sinks, dishwashers, prep areas, and appliances discharge into each unit. Then check the requirements of the local municipality or sewer authority, including expectations for inspection, pumping, access, and records.
2. Establish a baseline condition
If the service history is incomplete or the trap is already showing symptoms, arrange an assessment rather than guessing at the next date. Note the amount of grease and solids, visible condition, odors, drainage performance, access problems, and previous recommendations.
3. Assess the kitchen’s loading rate
Review the factors that affect how quickly fats, oils, grease, and food solids reach the trap. These include daily meal volume, operating hours, frying and grilling, menu changes, dishwashing activity, trap size, staff habits, and the effectiveness of strainers and pre-scraping.
4. Choose a cautious starting interval
Use the baseline and operating profile to choose a starting interval that leaves room for observation. A high-grease kitchen should not wait for repeated odors or slow drains before arranging service. A lower-volume operation may be able to use a longer interval, but that should be supported by inspection findings and local expectations.
5. Review and adjust
After each service, compare the actual accumulation with the planned interval. If the trap is approaching its capacity threshold early, shorten the interval. If several documented services show low loading and no symptoms, discuss whether adjustment is appropriate while continuing to follow applicable local requirements.
What Should Change Your Pumping Frequency?
Your grease trap pumping frequency should become more frequent when the kitchen produces more grease or solids, when the trap has less usable capacity, or when source-control practices are inconsistent.
- Menu: Frequent frying, deep-frying, grilling, and high-fat food preparation can increase FOG loading.
- Volume: More meals, dishes, and operating hours generally create more wastewater and grease.
- Equipment: Dishwashers, prep sinks, floor drains, and cooking equipment may send different amounts of grease and solids toward the interceptor.
- Trap condition: Buildup, damaged components, poor access, or reduced capacity can affect performance.
- Staff practices: Rinsing grease into drains and failing to use strainers can accelerate loading.
- Seasonal demand: Patio season, holidays, events, and tourism can change output for part of the year.
- Previous service findings: The last few pump-outs provide better planning evidence than a generic industry interval.
Example Schedule Ranges by Kitchen Profile
The table below is a planning framework, not a list of legal intervals. Local requirements, trap condition, and service findings take priority.
| Kitchen profile | What to review | Planning approach |
|---|---|---|
| Lower-volume café or limited-service kitchen | Menu, operating days, sink usage, and recent accumulation | Start with a documented interval and lengthen only when inspections consistently support it |
| Moderate-volume restaurant | Meal volume, dishwashing, frying, and staff source control | Use regular planned service with periodic checks for early loading or symptoms |
| Busy restaurant or quick-service kitchen | High output, frying, long operating hours, and seasonal peaks | Review more frequently and consider a shorter recurring interval; published guidance gives one to three months as an example for busy restaurants |
| Seasonal or event-driven operation | Expected demand spikes and periods of closure | Plan before peak periods and reassess after unusually busy weeks |
| High-grease kitchen | FOG accumulation, solids, trap capacity, and recurring symptoms | Use threshold and condition checks to prevent the trap from reaching a problem state |
For more detail on grease trap pumping frequency, compare the planned interval with actual loading, seasonal demand, and the 25% threshold rather than relying on the calendar alone.
How to Use the 25% Rule Without Treating It as Universal Law
The 25% rule refers to arranging service when the combined layer of FOG and solids reaches roughly a quarter of the trap’s liquid depth. Robinhood Cleaners’ published guidance presents this as a practical service trigger, and it can help operators identify when a trap is losing effective capacity.
However, the threshold should not automatically be treated as a province-wide legal requirement. Confirm whether your municipality or sewer authority uses this measure, how it defines the threshold, and what records or service timing it expects. Even where the threshold is not formally specified, monitoring accumulation can provide useful evidence for planning.
Do not wait for an overflow simply because a measurement has not reached 25%. Odors, slow drainage, gurgling, visible grease, or a history of rapid loading may justify an earlier assessment.
Daily and Weekly Practices That Reduce Trap Loading
Staff source control reduces the amount of grease entering the drainage system, but it does not replace professional pumping.
- Scrape food and grease into waste containers before washing cookware and dishes.
- Dry-wipe pans and surfaces before rinsing them.
- Use suitable sink strainers to capture food solids.
- Store used cooking oil for proper collection instead of pouring it into a drain.
- Do not rely on hot water to carry grease away. Grease can cool farther down the plumbing.
- Check visible lids, seals, access areas, and nearby floors when it is safe to do so.
- Report odors, slow drains, gurgling, bubbles, or recurring sink issues promptly.
- Keep a log that connects observations with service dates and recommendations.
Signs the Trap Needs Assessment Before the Next Planned Visit
Symptoms do not identify the exact cause by themselves, but they are reasons to investigate rather than wait for the next routine appointment.
- Persistent or worsening grease odors near sinks, floor drains, or access points.
- Slow drainage, gurgling, bubbling, or recurring backups.
- Visible grease around the lid, fittings, floor, or surrounding plumbing.
- Repeated sink problems after staff have followed normal source-control procedures.
- Overflow, wastewater standing near the trap, or evidence of leakage.
- Unusually rapid accumulation compared with the previous service.
- A change in menu, meal volume, equipment, or operating hours that increases grease production.
If an overflow or backup occurs, protect staff and customers from exposure, limit further discharge where practical, and arrange professional advice. Do not treat additives or hot water as a substitute for removing accumulated grease and solids.
What Professional Grease Trap Service Should Cover
When comparing providers, ask for a written scope rather than assuming that “pumping” includes every maintenance task. Professional service may involve complete removal of accumulated FOG and solids, scraping where needed, inspection of relevant components, and documentation of the work. The exact scope depends on the trap, access, condition, and service agreement.
Ask whether the provider will identify the trap serviced, explain visible findings, note access or seal concerns, and provide a record for your files. Recommended repairs, line work, disposal arrangements, or additional services should be clearly identified rather than implied.
Grease Trap Service vs. Other Kitchen Maintenance
Grease trap service addresses wastewater drainage equipment. It is separate from hood, duct, filter, exhaust fan, appliance, and ventilation maintenance. Cleaning the trap does not clean grease-laden vapors from an exhaust system, and exhaust cleaning does not remove accumulated material from a grease interceptor.
Coordinating related work may reduce scheduling disruption, but each task should have its own scope. When reviewing hood cleaning services in Ontario, confirm separately whether grease trap cleaning, filter exchange, fan belt work, appliance cleaning, or other maintenance is included.
Checklist for Booking Grease Trap Pumping in Ontario
- Which trap or interceptor will be serviced, and what fixtures discharge into it?
- What does the quoted work include: pumping, removal of solids, scraping, inspection, and documentation?
- What access, preparation, shutdown, and cleanup will the kitchen need to provide?
- How long should the service window be, and can it be scheduled outside operating hours?
- How will removed grease and solids be handled and disposed of?
- Will the provider identify findings, access problems, leaks, or follow-up needs?
- Which items are included, and which could create additional charges?
- What records will be supplied after the visit?
- What interval does the provider recommend, and what evidence supports it?
- Have you checked the requirements of the applicable municipality or sewer authority?
What to Record After Each Service
Keep one log for each trap or interceptor. At minimum, record the service date, location or identifier, observed FOG and solids condition, work completed, access or component concerns, recommendations, and the next review date. Add kitchen volume, menu, or operating changes that could explain unusual loading.
Records help you compare actual conditions over time and support schedule changes. They do not independently prove regulatory compliance. Keep them with applicable municipal guidance, invoices, service reports, and evidence of completed follow-up.
Frequently Asked Questions
Is there one mandatory grease trap pumping interval for all Ontario restaurants?
Not on the evidence available here. Ontario has general food-premises sanitation requirements, while detailed sewer and interceptor expectations can vary by municipality or sewer authority. Verify the rules that apply to your site, then use kitchen conditions and records to refine the schedule.
How should a restaurant use the 25% FOG-and-solids threshold?
Use it as a practical trigger where applicable and confirm how your local authority defines and applies it. Service should not be delayed when symptoms, rapid loading, or other evidence indicates that the trap needs attention sooner.
Can daily scraping and dry-wiping replace professional pumping?
No. These practices reduce the grease and solids entering the trap, but they do not remove material that has already accumulated inside it. Continue planned inspection and professional service.
What should a restaurant do if it notices odors or slow drains before the next scheduled service?
Record the symptom, check whether it is recurring, and arrange an assessment rather than waiting automatically for the planned date. Limit additional grease discharge and avoid relying on hot water or unapproved treatments.
What records should an Ontario kitchen keep after grease trap service?
Keep the date, trap identification, condition or accumulation observations, work performed, recommendations, disposal or service documentation supplied, and next review date.
Is grease trap pumping the same as commercial kitchen hood or duct cleaning?
No. Pumping maintains the drainage and wastewater system. Hood and duct cleaning addresses the exhaust path, while filter, fan, appliance, and ventilation work address other components.
Conclusion: Build the Schedule From Evidence, Then Revisit It
A reliable Ontario grease trap pumping schedule starts with local verification, then adds the facts of your kitchen: trap type, menu, volume, operating hours, staff practices, seasonal demand, previous buildup, symptoms, and service records. Use the 25% threshold as a useful operational signal where appropriate, not as an automatic province-wide legal rule.
Start with daily source control, routine observation, and a documented professional service plan. Review the results after each visit and shorten the interval when accumulation or symptoms show that the current schedule is too slow.
Robinhood Cleaners provides grease trap cleaning and related commercial kitchen cleaning services across Ontario, with stated 24/7 scheduling and quick service in Southern Ontario. Contact the team to discuss your kitchen’s conditions and arrange a service estimate.