Last updated 2026-08-21
TL;DR
A grease trap is a plumbing interceptor that holds fats, oils, and grease so they do not clog the sewer. Starting grease trap work means picking a lane (pumping, install, or yellow grease), then getting the state or city paper that lane uses. There is no national grease trap license. Haulers need a transporter or septage credential, trip tickets, and a legal dump. Confirm forms and fees with the board that issues them.
What is a grease trap?
A grease trap is a plumbing interceptor that slows kitchen wastewater so fats, oils, and grease float and food solids settle, instead of coating the inside of the sewer. Kitchens run them because utilities treat FOG as a clog risk. If you are entering grease trap work, you are usually entering pump-out, tank install, or both.
Federal pretreatment law does not license grease trap companies. It tells sewer plants to keep obstructing pollutants out of the pipes. 40 CFR 403.5 requires POTWs to prohibit "Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in Interference." [1] The city FOG ordinance is the document that names traps, pumping windows, and fines.
The 2021 International Plumbing Code Chapter 10 requires a grease interceptor or automatic grease removal device to receive drainage from fixtures and equipment with grease-laden waste in food preparation areas. [2] Cities adopt different code years. Read the local amendment.
People mix up three objects. A small under-sink hydromechanical unit. A large outdoor gravity interceptor. A grease recovery device. Cooks still say grease trap for all three. Do not argue vocabulary with an inspector. Ask which sizing sheet they want.
EPA's pretreatment introduction is the federal frame: users that discharge to a POTW can be required to pretreat so they do not cause pass through or interference. [3] That is why a new kitchen gets an interceptor note on the plumbing review. The paper that follows the tank matters more than the brand of lid.
How do you start grease trap work?
You start by picking a lane, then collecting the paper that lane actually uses. Pumping brown grease is a waste transporter path. Setting tanks is a plumbing contractor path. Collecting fryer oil is often a renderer or inedible kitchen grease path. Mixing those in your head is how people buy the wrong truck.
There is no national grease trap license. Call three desks before you spend money on a vacuum pump. The city or county FOG coordinator. The state waste transporter or septage desk. A receiving plant that will take the material in writing. If you cannot name the disposal outlet, you do not have a business.
Restaurant-side start means a plumbing permit, the interceptor the jurisdiction sizes, and a cleaning contract the FOG program can inspect. Hauler-side start means transporter registration where the state runs that program, trip tickets, and insurance the receiver will accept.
Texas registers sludge transporters, including grease trap waste, under 30 TAC 312.142. [5] New York requires a waste transporter permit under Environmental Conservation Law section 27-0305 before you haul regulated waste. [6] California registers inedible kitchen grease transporters with CDFA. [7] Your state may use different nouns for the same job. Confirm the form names with the board.
Do not treat a blog checklist as the permit. GreaseTrapPath sells a $199 one-time Interceptor + Manifest Kit at /start if you want forms in one pile. You do not need it to use this guide.
What is the difference between a grease trap and a grease interceptor?
A grease trap is usually the smaller indoor hydromechanical unit. A grease interceptor is usually the larger outdoor gravity tank. Many ordinances and cooks use the words as synonyms. Sizing, pumping access, and who may install them still differ.
Hydromechanical units are often rated in gallons per minute and pounds of grease. Gravity interceptors are sized in gallons, with longer detention. Massachusetts 310 CMR 15.230 sets a 1,000 gallon minimum grease trap capacity and at least 24 hours of detention for kitchen flow on Title 5 systems. [4] That is an onsite sewage number. Do not paste it onto a downtown sewer interceptor without reading the city spec.
Florida's onsite sewage chapter 64E-6.008 is another septic-side sizing rule set, and it is where grease interceptors show up on properties that are not on city sewer. [8] Onsite is not a metro FOG program. Ask which code you are under.
If you sell pumping, the difference that matters is access and volume. Indoor traps are frequent, small, and messy. Outdoor interceptors need a vacuum truck and generate the trip tickets cities audit. I would not build a route only on under-sink boxes unless you like parking in alleys for a few gallons of sludge.
| Lane | What you touch | First paper to ask for |
|---|---|---|
| Pump-out (brown grease) | Interceptor contents | State waste transporter or septage credential |
| Yellow grease | Fryer oil | Renderer contract or IKG registration |
| Install | New tanks and piping | Plumbing permit and contractor license |
Do you need a license to pump grease traps?
Usually yes, but it is not one federal card. Most states treat grease trap pump-out as liquid waste, septage, sludge, or special waste hauling. The credential is a transporter registration, a septage hauler license, or a waste transporter permit. Some cities also list approved haulers on a FOG roster. You can hold the state permit and still get bounced by a local program that wants extra insurance.
New York Environmental Conservation Law 27-0305 requires a permit to engage in the transportation of waste originating or to be disposed of in the state, unless an exemption applies. [6] Texas Chapter 312 registration covers grease trap waste transporters. [5] California's CDFA inedible kitchen grease registration is the fryer-oil transporter stack, which is easy to confuse with brown grease wastewater rules. [7] Call both desks if you will touch fryer oil and trap pumpings.
Plumbing licenses are for install and piping, not for vacuum work. I have watched people burn months chasing a contractor license they did not need for hauling. I have also watched haulers move piping and get cited. Stay in your lane until the building department says otherwise.
Confirm current fees with the issuing board. Boards change them. A stale number here would be worse than none.
What paperwork do grease trap haulers actually carry?
Trip tickets. Manifests if your state uses that word. Vehicle registration as a transporter. Disposal receipts from the receiving facility. The restaurant interceptor ID if the city FOG program issues one. That is the daily paper path.
Texas 30 TAC 312.145 makes transporters use trip tickets and keep records TCEQ can inspect. [9] Copy that habit even if you work outside Texas. When a FOG inspector asks who pumped interceptor 14 last October, a text message is not a record.
EPA Form 8700-22, the Uniform Hazardous Waste Manifest, is for hazardous waste shipments. Typical restaurant grease trap contents are not listed hazardous waste. [10] Mix solvents or shop waste into the tank and you can create a real RCRA problem. Do not be clever. Keep kitchen FOG as kitchen FOG.
Some receivers still want a non-hazardous waste manifest or a bill of lading plus a waste profile. Ask the plant. Then copy their form for a few months of jobs before you buy software. Paper in a cab envelope beats a dashboard you never open.
Cities audit restaurants, and restaurants then audit you. Keep the same ticket numbers the owner was given. If the hole in your file is liability cover, read grease trap guide 11 and grease trap guide 17 next.
Is grease trap waste hazardous?
Usually no. Under 40 CFR 261.3, a waste is hazardous if it is listed or if it shows a characteristic such as ignitability, corrosivity, reactivity, or toxicity. [10] Straight kitchen FOG and food solids from a trap typically fail those tests. It is still regulated liquid waste. Not hazardous does not mean pour it in a storm drain.
Brown grease is trap and interceptor contents. It is wet, sour, and often goes to a wastewater plant, a FOG receiving station, or a processor that can handle it. Yellow grease is used fryer oil, a commodity with theft problems and renderer contracts. Do not haul them as if they were the same product.
If a shop floor drain is tied to the interceptor, you can pick up oils that are not food. That is how people stumble into characteristic hazardous waste. I would refuse mixed loads. One contaminated tank can close your receiving plant door.
How often do grease traps need to be pumped?
As often as the local FOG ordinance and the 25 percent rule say. That is not a national calendar. Many programs require pumping when FOG and solids fill 25 percent of the interceptor, or on a fixed schedule, whichever comes first.
Massachusetts 310 CMR 15.351 requires grease trap cleaning at 25 percent of effective depth or at least every three months, whichever is sooner, with monthly inspection on Title 5 systems. [4] That 25 percent / 90 day pair shows up in a lot of city sewer ordinances too. You still read the ordinance you are pumping under.
High-volume fryers fill a small indoor trap in a week. An oversized gravity interceptor at a slow sandwich shop might look clean at 90 days. I would rather pump on measured depth than on a route sales pitch. Sell the inspection, then the pump. Sell only 90-day contracts and you will over-pump some sites and under-pump the ones that cause backups.
The utility cares about blockages, not your recurring revenue. EPA's pretreatment materials treat FOG control as part of keeping collection systems from interfering with the POTW. [3]
What vehicle and CDL rules apply to grease trucks?
If the truck's GVWR is 26,001 pounds or more, you are in CDL territory. 49 CFR 383.91 puts a single vehicle at that weight in Class B, and a combination over the Class A thresholds in Class A. [11] Many vacuum trucks sit on that line. Confirm GVWR on the door sticker, not a sales pitch.
A tanker endorsement can apply when you haul liquid in tanks, depending on capacity and whether FMCSA treats the unit as a tank vehicle. I am not going to fake a threshold. Read 49 CFR 383 with your actual tank size, or ask the state DMV CDL desk.
You also need whatever waste transporter decal the state puts on the door. Texas and New York both care that the registered vehicle matches the permit. [5] [6] A rented dump trailer is not a grease program vehicle.
I would not buy a new chassis until a receiver has said yes to your waste stream. A pretty truck with nowhere legal to dump is a bad asset.
Can you enter a grease trap to clean it?
You can, and it can kill you. OSHA's permit-required confined space standard applies to spaces that are large enough to enter, have limited entry, and are not designed for continuous occupancy. OSHA defines a confined space as a space that "(1) Is large enough and so configured that an employee can bodily enter and perform assigned work; and (2) Has limited or restricted means for entry or exit (for example, tanks, vessels, silos, storage bins, hoppers, vaults, and pits are spaces that may have limited means of entry.); and (3) Is not designed for continuous employee occupancy." [12]
Grease interceptors fit. Hydrogen sulfide, oxygen displacement, and drowning in sludge are not theoretical. Most pumping should stay from the surface with a vacuum hose. If someone has to enter, that is a full permit-required confined space job: atmospheric testing, attendant, rescue plan.
I would subcontract entry or refuse it until the program is real. A scraper on a pole is cheaper than a funeral. Do not treat "we have always jumped in" as a procedure. 29 CFR 1910.146 is the document. [12]
Where does pumped grease trap waste go?
To a facility permitted to take grease trap waste. That may be a POTW receiving station, a private FOG dewatering plant, a land application program where allowed, or a renderer that actually accepts brown grease. Storm drains, manholes, and farm fields without a permit are how haulers lose their registration.
The receiver sets the profile. Some plants cap percent solids, FOG, or pH. Some refuse interceptor waste from sites that also grind. Get the acceptance letter before you sell a route in that city.
Interstate loads can trip transporter rules in both states. New York's permit logic follows waste that originates or is disposed in the state. [6] Plan the dump, then the pump.
Keep a one-page list of outlets, hours, and rejection rules in the cab. When the first plant is down, you need the second number, not a hope.
What does first-year grease trap operations look like?
Slow paper, lumpy cash, and lids that do not match the as-built drawing. First year is route building plus compliance muscle memory. Done right, you spend more hours on tickets, insurance certificates, and city vendor packets than on pumping.
Expect restaurants to want you on their FOG file before they care about your price. Expect the city to want proof of disposal. Expect the receiver to want you on a waiting list at 6 a.m. None of that is a crisis. It is the job.
Insurance questions show up immediately: auto liability on a heavy truck, pollution or waste endorsements, general liability the city names as additional insured. Those files live in grease trap guide 23, grease trap guide 35, and grease trap guide 47. Read those before you guess a premium.
I would not hire a second truck until the first truck has a disposal slot that does not bounce you. Growth without an outlet is how people dump illegally.
Waste of money in year one: custom app development, wrap graphics on a leased truck, and exclusive territory fees from a franchise pitch. Spend on hose, PPE, a way to measure the 25 percent layer, and a filing system you will actually use. [4]
How much does it cost to start a grease trap route?
Nobody publishes a clean national start-up cost for grease trap hauling. The range is dominated by the truck. A used vacuum truck can land anywhere from a tired workhorse to a six-figure unit depending on year, tank, and pump. I will not invent a sticker price. Get three actual quotes and a mechanic's inspection.
The paper itself is usually cheaper than people fear, and the fees are set by boards that change them. Confirm with the relevant board. Add insurance down payments, any city vendor bond they ask for, and the first months of dump fees. Dump fees per gallon or per load vary by metro. Ask the plant.
Plumbing install businesses carry different capital: excavation, tanks, and a contractor license bond. That is not a used-vac-truck problem.
Waste of money: paying a consultant to get you EPA licensed for restaurant FOG hauling. EPA does not issue that card. [3] Also a waste: buying interceptor inventory before you have a plumbing permit path in the cities you will work.
If capital is tight, one truck and a written dump contract is the path I would take over a branded franchise.
What should you confirm with the board before you take a job?
The exact credential name, the vehicle list, the waste codes they want on the ticket, and whether brown grease and yellow grease are the same registration. Ask whether a city FOG roster is separate from the state transporter permit. Ask how they want closure if you sell the truck.
Boards do not care that you read a national blog. They care that the tank ID, the driver's name, and the receiving facility match yesterday's load. New York, Texas, and California all illustrate the same idea with different forms. [5] [6] [7]
For the restaurant owner reading this: your start is the plumbing permit and the FOG program application, plus a hauler who can prove disposal. You do not become a hauler by owning a shop. IPC Chapter 10 is the plumbing-side starting point many cities still point to. [2]
More insurance reading if that is the hole in your file: grease trap guide 59, grease trap guide 71, and grease trap guide 83.
GreaseTrapPath is an independent publisher, not a law firm and not a service company. If you want the kit, it is at /start. Confirm every fee, quota, and processing time with the board that issues the paper.
Frequently asked questions
What is a grease trap?
A grease trap is a plumbing interceptor on a kitchen drain that slows wastewater so fats, oils, and grease float and solids settle. Utilities require them because FOG clogs sewers. Cooks use the name for both small indoor units and large outdoor interceptors. The legal details live in the city FOG ordinance and the plumbing code the city adopted.
How do you start grease trap work?
Pick a lane first: pumping brown grease, installing tanks, or collecting yellow grease. Then call the FOG desk, the state transporter or septage board, and a legal disposal outlet. There is no national grease trap license. Do not buy a truck until a receiver will take the waste in writing. Confirm form names and fees with the issuing board.
Is a grease trap the same as a grease interceptor?
Not in careful plumbing language. A trap is usually the smaller indoor hydromechanical unit. An interceptor is usually the large outdoor gravity tank. Many ordinances still use the words as synonyms. Sizing sheets, pumping access, and who may install them differ, so ask the inspector which device and which calculation they want.
Do I need an EPA permit to pump grease traps?
No. EPA's pretreatment rules tell POTWs to block obstructing pollutants. They do not issue a grease trap hauler card. Your credential is a state or county waste transporter, septage, or sludge registration, plus any city FOG hauler roster. Anyone selling an EPA grease license for restaurant pump-out is wasting your money.
How often should a restaurant pump its grease trap?
Follow the local FOG ordinance. Many programs use a 25 percent full rule, a fixed schedule, or both. Massachusetts Title 5 requires cleaning at 25 percent of effective depth or at least every three months, whichever is sooner, on those onsite systems. High-volume fryers can fill a small indoor trap much faster than 90 days.
Is grease trap waste hazardous waste?
Straight kitchen FOG usually is not listed or characteristic hazardous waste under 40 CFR 261.3. It is still regulated liquid waste and cannot go to a storm drain. Mixed solvents or shop oils can change that. Keep kitchen loads clean, and use a hazardous waste manifest only if the waste actually meets the hazardous definition.
Do I need a CDL to drive a grease truck?
If GVWR is 26,001 pounds or more, 49 CFR 383.91 puts a single vehicle in Class B CDL territory. Combinations can trigger Class A. Tanker endorsement depends on tank size and FMCSA tank-vehicle rules. Read the door sticker and ask the state CDL desk. A light service van pumping tiny indoor traps may stay under the line.
What is a grease waste manifest or trip ticket?
It is the load record: who pumped, which interceptor, how many gallons, and where it was dumped. Texas 30 TAC 312.145 requires trip tickets for registered transporters. Other states use manifests or bills of lading. This is not the same as EPA's hazardous waste manifest unless the load is actually hazardous.
Can I dump grease trap waste at a wastewater plant?
Only if that POTW or a contracted FOG station accepts grease trap waste and you are on their list. Many plants refuse random walk-up loads. Get a written acceptance profile first. Illegal manhole dumping is how haulers lose transporter registrations. Always plan the dump before you sell the pump.
Do I need a plumbing license to start pumping?
Not for vacuum pump-out in most places. Pumping is a waste hauler credential. Installing or re-piping an interceptor is plumbing work and needs the contractor license and a building permit. Mixing those jobs is a common way to get cited. Ask the building department before you touch piping.
What is brown grease vs yellow grease?
Brown grease is what you pump from a trap or interceptor: water, sludge, and FOG. Yellow grease is used fryer oil, a renderer commodity. Paper paths differ. California CDFA registration is an IKG transporter stack. Brown grease usually sits in septage or sludge transporter rules. Do not treat them as one product.
Are grease traps confined spaces?
Large interceptors typically meet OSHA's confined space definition in 29 CFR 1910.146: big enough to enter, limited exit, not designed for occupancy. Entry can be permit-required because of hydrogen sulfide and oxygen hazards. Pump from the surface when you can. Do not climb in without testing, an attendant, and a rescue plan.
How do I find the right board for my state?
Start with the state environmental agency's waste transporter, septage, or sludge desk, plus the city FOG coordinator. New York uses DEC waste transporter permits. Texas uses TCEQ Chapter 312 registration. California splits IKG (CDFA) from wastewater rules. Confirm the exact form name. Do not assume a neighboring state's paper works.
What insurance should a new grease trap operator look at first?
Heavy-truck auto liability, general liability the city can name as additional insured, and whatever pollution or waste endorsement the receiver and FOG program ask for. Premiums vary and I will not invent them. Use the insurance guides on this site for the paper path, then get quotes from a broker who actually writes vacuum trucks.
Sources
- eCFR 40 CFR 403.5 National pretreatment standards: Prohibited discharges: POTWs must prohibit solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in Interference.
- ICC 2021 International Plumbing Code Chapter 10 Traps, Interceptors and Separators: IPC Chapter 10 requires grease interceptors or automatic grease removal devices for grease-laden waste from food preparation area fixtures.
- U.S. EPA Introduction to the National Pretreatment Program (EPA-833-B-11-001, 2011): The national pretreatment program exists so industrial and commercial discharges to POTWs do not cause pass through or interference.
- Massachusetts 310 CMR 15.000 Title 5 State Environmental Code: Title 5 sets a 1,000 gallon minimum grease trap capacity with 24-hour kitchen-flow detention, and cleaning at 25 percent of effective depth or at least every three months.
- Texas 30 TAC 312.142 Registration of Transporters: Texas requires registration of transporters of sludge, including grease trap waste, with TCEQ under Chapter 312.
- New York Environmental Conservation Law § 27-0305 Waste transporter permits: New York requires a waste transporter permit to haul regulated waste originating or to be disposed of in the state unless an exemption applies.
- California Department of Food and Agriculture Inedible Kitchen Grease Program: California requires inedible kitchen grease transporters to register with CDFA.
- Florida Administrative Code 64E-6.008 System Size Determination: Florida onsite sewage rules in 64E-6.008 govern system sizing for establishments, including food service sites that use grease interceptors on septic.
- Texas 30 TAC 312.145 Transporters, Record Keeping: Registered Texas sludge transporters must use trip tickets and keep records of grease trap and related loads.
- eCFR 40 CFR 261.3 Definition of hazardous waste: A waste is hazardous under RCRA if it is listed or exhibits a hazardous characteristic such as ignitability, corrosivity, reactivity, or toxicity.
- eCFR 49 CFR 383.91 Commercial motor vehicle groups: A single vehicle with a GVWR of 26,001 pounds or more is a Class B commercial motor vehicle for CDL purposes.
- OSHA 29 CFR 1910.146 Permit-required confined spaces: A confined space is large enough to enter, has limited means of entry or exit, and is not designed for continuous employee occupancy.