How Can You Set a Grease Trap Pumping Schedule?
There is no single grease trap pumping schedule that suits every Ontario restaurant or commercial kitchen. The right plan combines applicable local sewer requirements, the type and volume of cooking, operating hours, trap condition, and measured grease-and-solids buildup. A calendar interval is useful for planning, but it should be checked against what is actually accumulating in the trap.
Grease-interceptor pumping requirements can depend on the sewer-system operator and local pretreatment program rather than on one universal industry rule. A commonly cited review point is when combined grease and solids reach one-quarter of the trap’s liquid capacity, but that threshold should not be presented as a province-wide legal requirement. Review the applicable local requirements before finalizing a schedule, and use inspection findings to adjust it.
Which factors should determine the schedule?
A useful schedule reflects how your kitchen operates, not simply what another business does. Before choosing an interval, gather the following information:
- Cooking activity: Frying, grilling, meat preparation, and other processes that discharge fats, oils, or grease can increase the load entering the interceptor.
- Operating hours: A kitchen operating six or seven days a week may accumulate material faster than a lower-volume operation with fewer service hours.
- Production volume: A busy food court, catering kitchen, or quick-service restaurant may have a different pattern from a smaller dining operation.
- Trap type, size, and condition: Capacity and condition affect how quickly the trap approaches a service threshold.
- Measured buildup: Inspection findings provide better evidence than assumptions. Record grease and solids levels where measurement is available.
- Local requirements: Confirm whether the applicable sewer authority or municipal program specifies an interval, record, access, or maintenance expectation.
One supplied schedule reference gives 30-day examples for kitchens using fats, oils, or grease or operating more than 40 hours per week, and 60-day examples for another listed operating condition. Those figures are examples from that guidance, not a mandatory schedule for every Ontario kitchen. Read the supplied pumping-schedule guidance.
Which scheduling method fits your kitchen?
Most operators choose between a fixed calendar, condition-based monitoring, or a combination of both. Each method has a place, but relying on only one can create gaps.
| Method | How it works | Strength | Limitation |
|---|---|---|---|
| Calendar-based | Service is booked at a recurring interval. | Easy to plan around staff, vendors, and operating hours. | A fixed date may be too late for a high-load kitchen or unnecessarily frequent for a lower-load operation. |
| Threshold-based | Service is triggered by measured or observed grease and solids buildup. | Responds to the trap’s actual condition. | Requires consistent inspection, access, and useful records. |
| Combined | A recurring appointment is supported by inspections and threshold reviews. | Provides planning discipline while allowing the schedule to change with evidence. | Requires someone to track findings and act on them. |
For many commercial kitchens, the combined approach is practical: reserve service in advance, then use inspection findings to bring the appointment forward or revise the recurring interval. Robinhood Cleaners describes a threshold-based approach that includes weekly inspection and cleaning before grease and solids exceed one-quarter of liquid depth; use that as business-specific context, not as a universal legal rule. See the described threshold-based grease trap program.
Mistake: copying another restaurant’s interval
A nearby restaurant’s schedule may not suit your kitchen. Its menu, fryer use, service hours, trap size, production volume, and local requirements may all be different. Even two locations under the same brand can develop different buildup rates.
Instead, ask what type and volume of cooking your kitchen performs, how many hours and days it operates, what the last inspection showed, what the applicable sewer program requires, and what interval keeps the trap below the chosen review threshold. This creates an evidence-based starting point without assuming that a 30-day, 60-day, or 90-day interval applies automatically.
Mistake: waiting for odors, slow drains, or backups
Odors, slow drainage, or a backup are signals that the trap or connected system needs attention. They are poor triggers for a preventive schedule because buildup may already be affecting daily operations. Maintenance guidance commonly connects an ignored trap with odors, slow drains, and failed inspections, while pumping guidance recommends service before combined grease and sludge reaches one-quarter of liquid depth. Review the maintenance warning signs and the one-quarter pumping guideline.
Add routine checks to the kitchen maintenance process, note unusual conditions, and arrange an assessment when buildup approaches the threshold or drainage performance changes. A symptom can have more than one cause, so it should prompt investigation rather than an assumption about the exact repair required.
Mistake: ignoring operating hours and grease load
Schedules often become outdated when a kitchen serves more meals, adds a fryer, expands catering, changes its menu, or extends its hours. A longer operating week means more opportunity for fats, oils, grease, and solids to enter the trap. Review the schedule after a material change and compare the new pattern with previous service records. Review the supplied discussion of frequency factors.
Mistake: treating NFPA 96 as the grease-trap schedule authority
Commercial kitchen exhaust cleaning and grease-interceptor pumping are related parts of kitchen maintenance, but they are not the same task. NFPA 96 concerns commercial cooking operations and exhaust-system fire-safety provisions; it should not automatically be treated as the authority for how often a grease trap must be pumped.
The supplied compliance research states that grease-interceptor pumping frequency depends on the sewer-system operator and applicable local pretreatment program rather than an NFPA standard. Confirm the requirement with the relevant local authority, and keep exhaust cleaning and grease-trap service as separate maintenance decisions. For context, see duct degreasing techniques in Ontario kitchens.
Mistake: failing to document pump-outs and review dates
A service date alone does not tell you whether the schedule is working. For each service, record the date and trap location, observed condition, measured grease or solids buildup where available, work completed, concerns noted, next planned service date, and next schedule-review date.
Keep these records with your commercial kitchen maintenance documents. They can reveal whether buildup is approaching the threshold before a recurring appointment and help identify changes that warrant a shorter review period. Service windows, truck capacity, and disposal-facility availability may also affect scheduling, so plan before the due date. See the supplied route-planning research.
What should you ask a grease trap service provider?
- Will the service include pumping, condition review, or both?
- How will grease and solids buildup be assessed or recorded?
- What will the service record include after the pump-out?
- Can the provider recommend an interval based on observed condition and kitchen workload?
- How far in advance should recurring appointments be booked?
- How are service windows handled during operating hours?
- Which parts of the work are included, and which require separate arrangements?
These questions help distinguish a one-time pump-out from a maintenance plan that supports better scheduling. They also give you a chance to explain changes in menu, volume, or operating hours before an interval is recommended.
A practical schedule review checklist
- Identify the authority. Confirm the applicable sewer-system, municipal, or pretreatment-program requirements.
- Describe the kitchen. Note cooking methods, grease-producing equipment, operating days, hours, and production changes.
- Inspect the trap. Record its condition and measure grease and solids where possible.
- Choose a provisional interval. Use local requirements, prior records, workload, and observed buildup rather than another restaurant’s calendar.
- Schedule before the review threshold. Leave time for provider availability and operational constraints.
- Document the service. Capture the date, findings, work performed, concerns, and next review date.
- Reassess after changes. Review the schedule when the menu, hours, volume, equipment, trap condition, or service findings change.
Build the schedule around evidence, not guesswork
The strongest grease trap pumping schedule is neither a universal number nor an appointment made only after a backup. It combines local requirements with kitchen workload, operating hours, trap condition, inspection results, and documented buildup. Use a calendar to plan service, inspections to test whether the interval remains suitable, and schedule reviews whenever the kitchen changes.
Ontario restaurants, catering operations, hospitality teams, food courts, and institutional kitchens can contact Robinhood Cleaners about grease trap cleaning and maintenance. The company provides coverage all over Ontario, with quick service in Southern Ontario.