What signs show a grease trap problem?
Slow drains, backups, odors, frequent pumping needs and failed municipal inspections.
Undersized traps fill quickly and pass grease downstream. Cities may require upgrades when inspections show problems or when a kitchen expands.
Keep pumping records; inspectors ask for them.
What does repair or replacement involve?
Indoor traps may be replaced relatively quickly. Outdoor interceptors can require excavation, concrete work and permits.
Get quotes from plumbers experienced with commercial grease systems, and ask about permit timelines.
Sizing is the question most owners ask too late. Many local codes size grease interceptors by the number and type of fixtures draining into them and the kitchen’s flow rate, and an expansion or a new dish machine can push an existing trap past its rating. If you are adding fixtures, ask your plumber to check sizing before the city does.
Plan the work around service. Outdoor interceptor replacements may close part of a parking lot or entrance for several days; indoor trap swaps can sometimes be done overnight. Ask the contractor for the sequence and how long drains will be out of service so you can schedule prep and dish work around it.
How do I avoid future problems?
Pump on schedule, train staff to scrape plates, use strainers and avoid pouring grease down drains.
Good habits reduce pumping frequency and protect the system.
| Practice | Benefit | Frequency |
|---|---|---|
| Scheduled pumping | Prevents overflow | Based on volume |
| Plate scraping | Less grease | Every shift |
| Drain strainers | Fewer solids | Always |
| Pumping records | Inspection proof | Every service |
Worked example: an interceptor replacement
A restaurant averaging $120,000 in monthly deposits is told by the city to replace a cracked outdoor interceptor and gets a $19,000 quote including excavation and permits. Using an illustrative factor rate of 1.22, $19,000 would mean $23,180 repaid over roughly 6 months: 126 daily payments of about $184.
That works out to about $3,863 a month, or 3.2% of the $120,000 this business deposits monthly, and the total cost of the money is $4,180. Meeting the city’s deadline avoids fines and a possible closure.
For comparison, repaying the same $23,180 over 4 months would lift the monthly outlay to about $5,795, or 4.8% of deposits, and because shorter terms often carry a lower factor rate in practice, it is worth asking to see both before choosing.
| Average monthly deposits | $120,000 |
|---|---|
| Amount funded | $19,000 |
| Factor rate (illustrative) | 1.22 |
| Total repaid | $23,180 |
| Cost of the funding | $4,180 |
| Term | about 6 months |
| Daily payment (126 payments) | $184 |
| Payments as a share of deposits | 3.2% |
Who this fits
Usually a fit
- Kitchens facing grease system orders
- Owners with failing traps
- Operators expanding volume
When to hold off
- Simple pumping issues
- Owners with reserves
- New kitchens without deposit history
What you’ll typically need
- Recent business bank statements
- Plumbing quote
- City notice if any
- Business details
Frequently asked questions
Can funding cover excavation and permits?
Yes; working capital can cover all related costs.
How often should traps be pumped?
It depends on size and volume.
How quickly can money for interceptor work arrive?
Most kitchen files get a same-day decision once bank statements are uploaded, and approved money for interceptor work often lands within one or two business days.
Does a 500 credit score rule me out for interceptor work?
No. Applicants from 500 can be reviewed for interceptor work; the deposit history does most of the work, and better credit typically improves the terms you are offered.
Grease trap problem?
Apply now.
Updated October 6, 2026