Why a Grease Trap Needs Scheduled Pumping
Hot dishwater carries grease out of the sink as a liquid. Downstream it cools, turns solid and sticks — to the pipe wall, to a lift station's pumps, or to the soil in a drain field. The trap, or the larger in-ground interceptor behind the building, is where that cooling is meant to happen on purpose: grease rises, food solids sink, and the clearer water in the middle moves on.
The catch is that a trap has a fixed volume. As the grease cap thickens and the bottom solids build, the separation zone shrinks, water passes through quicker and grease starts riding out the outlet. By the time the kitchen notices sluggish floor drains or a sour smell by the dish pit, the trap has usually been letting grease through for a while.
That is why traps go on a pumping schedule instead of waiting for a backup. The right interval depends on the size of the trap and how hard the kitchen works it, and some sewer programs base it on how full the trap gets rather than on the calendar — so ask the authority that permits your trap which approach it uses.
What the Rules Say, in General Terms
We are not your regulator, and the details depend on where the kitchen is and what it drains to, so read this as orientation rather than legal advice.
- State level. The Louisiana Sanitary Code, enforced by the Louisiana Department of Health, calls for an approved grease trap where a food establishment's grease can reach the drain in amounts that cause stoppages or interfere with sewage treatment. The trap has to be easy to reach for cleaning and serviced as often as necessary.
- Plumbing rules. The plumbing part of the same code says traps and interceptors are to be kept in efficient operating condition by periodically removing the accumulated grease, does not allow that grease to go back into the drain or sewer, and leaves each unit's size, type and location to the local plumbing official.
- East Baton Rouge Parish. The City-Parish says businesses discharging anything other than domestic wastewater need a pretreatment program — in the food industry, typically a grease trap or grease interceptor. Its Department of Environmental Services inspects permitted traps, including whether they are properly cleaned and maintained.
- Elsewhere. Kitchens in other parishes, or on a private septic system, answer to their own sewer utility or parish health unit.
No single pumping frequency fits every kitchen, so you won't find one quoted here. The authority that permits your trap sets the expectation, and we schedule the work around it.
The Grease Trap Cleaning Process
A proper service visit is more than skimming the cap off the trap. It covers:
- Find and open the unit. Indoor traps usually open by hand; in-ground interceptors have heavy lids out back. If a lid sits under a dumpster pad or fresh mulch, say so when you call.
- Measure first. The grease cap and the settled solids are measured before pumping, which shows whether the current schedule is about right or too loose.
- Full pump-out. Floating grease, liquid and bottom solids come out of every compartment. Skimming the cap and leaving the sludge is how a trap gets “cleaned” and keeps passing solids anyway.
- Scrape-down. Hardened grease is scraped off the walls, the baffles and the inlet and outlet tees, so the trap starts its next cycle with its full working volume.
- Check the fittings. With the unit empty, a missing outlet tee or a cracked baffle — either one lets grease skip the trap — is easy to spot.
- Close it up. Depending on the unit and the local rule, the trap may be refilled with clean water, then the lids are reset so odors stay inside.
- Disposal paperwork. You get a written service record, often called a manifest, showing the date, the unit serviced, the volume removed and where the waste went for disposal. File it with the kitchen's maintenance records for the next inspection.
Restaurants, Commercial Kitchens and Food Trucks
Restaurants. Fryers, griddles, woks and dish machines all push grease toward the drain. Tell us your service hours and we will aim to book the pump-out for a closed or slow stretch.
Commercial kitchens. Cafeterias, caterers, school and church kitchens and event venues often cook in bursts, so their traps fill unevenly. Measuring at each visit beats guessing.
Food trucks. A truck's grease and gray water usually end up at a commissary or base kitchen, and that location's trap carries the load for every truck that empties there. If you run the commissary, or your truck carries its own grease tank, the same pump-out and paperwork apply.
Kitchens on Septic Have More at Stake
Some kitchens around the edges of Baton Rouge drain to a septic tank and drain field instead of city sewer. For them, grease that gets past the trap floats in the septic tank, thickens the scum layer and eventually washes out to the field, where it coats the soil and seals it. In our clay, a sealed field is a far bigger bill than any trap service. Keep the trap and the tank on coordinated schedules — the tank side is on our septic tank pumping page, and if the field already shows wet spots, start with drain field repair.
What Moves the Price of Grease Trap Cleaning
We don't post a flat rate, because two kitchens with similar menus can have very different traps. The quote comes down to these factors:
- Trap size and type. An indoor unit and an in-ground interceptor are different jobs; capacity and the number of compartments decide how much is hauled away and how long the visit runs.
- Access. How close the truck can park to the lids, whether the lids are at grade or buried, and whether the work has to happen after hours or around parking-lot traffic.
- Condition and time since the last pump-out. A trap well past due holds hardened grease that takes more labor to remove than one on a steady schedule.
- Frequency. Regular service usually means lighter, simpler visits than calling only when the floor drains back up.
- Disposal. What comes out has to be hauled to a facility that accepts grease trap waste, so the volume removed is part of the cost.
- Repairs found on the visit. A missing tee, a broken baffle or a cracked lid is quoted separately, before any work is done.
Have the trap size, where the lids sit and how often the kitchen cooks ready, then call for a written quote.
Grease Trap Service Across Greater Baton Rouge
We take grease trap calls from kitchens across East Baton Rouge, Livingston and Ascension Parishes. The communities we cover are listed on the service areas page.
Grease Trap Cleaning FAQs
How often does a restaurant grease trap need to be pumped?
There is no single answer. It depends on the trap’s size, the menu, the hours and how much grease reaches the drain, and the authority that permits your trap may set its own expectation, so start there. Measuring the grease cap and the settled solids at each visit shows whether the schedule should tighten or can stay where it is.
What is the difference between a grease trap and a grease interceptor?
In everyday use the terms overlap. A grease trap usually means a smaller unit inside the kitchen, under or beside a sink. A grease interceptor usually means a larger tank buried outside that serves the whole kitchen. Both separate grease the same way and both need pumping; the interceptor simply holds more and needs a truck.
Can kitchen staff clean the grease trap themselves?
Staff can skim a small indoor trap between services, and some kitchens do. What nobody can do is pour the collected grease back down a drain — Louisiana’s plumbing rules do not allow it to be discharged into the drainage piping or the sewer. A full interceptor pump-out needs a truck, and the waste has to go to a facility that accepts it.
Do you provide paperwork for health or sewer inspections?
Yes. Each visit comes with a written service record showing the date, the unit serviced, the volume removed and where the waste was taken. Keep it on file with the kitchen’s maintenance records so it is ready when an inspector asks.
What if our grease trap needs to be replaced, or a new one installed?
New traps and interceptors are plumbing work, and Louisiana’s plumbing rules leave each unit’s size, type and location to the local plumbing official, with approval before installation begins. If a service visit shows your unit is undersized or failing, call (225) 325-0340 and we will talk through the options and the approval step.