For restaurant owners and food service operators, grease trap maintenance may not be the most exciting item on the to-do list, but it is one of the easiest things to stay ahead of before it becomes a much bigger problem.
A properly maintained grease trap helps keep fats, oils and grease, commonly called FOG, out of your plumbing system and the public sewer system. When that trap becomes overloaded, the results can range from unpleasant odors and slow drains to a full sewage backup in the middle of a busy dinner shift.
For restaurants, commercial kitchens and property managers across Mobile, Baldwin and Washington Counties, establishing a dependable restaurant grease trap service schedule can help protect your plumbing, your business and your customers.
Why Grease Trap Maintenance Matters
Every commercial kitchen produces some amount of FOG. It can come from cooking oils, meat fats, butter, sauces, dairy products and even the residue left behind when dishes, cookware and kitchen equipment are washed.
A grease trap or grease interceptor is designed to separate that material from wastewater before it reaches the sewer. But the trap has a limited capacity. As grease floats to the top and food solids settle to the bottom, there is gradually less room for the trap to do its job. Eventually, grease can begin passing through the system and collecting inside drain and sewer lines.
That is why routine grease trap cleaning in Mobile, AL, and throughout the surrounding Gulf Coast area is preventive maintenance, not simply something to schedule after a problem develops.
Mobile has seen the effects of grease in sewer systems firsthand. Mobile Area Water & Sewer System (MAWSS) identifies grease management as an important part of its Pretreatment Program.
What Happens When a Grease Trap Is Not Cleaned?
Waiting too long between cleanings can create problems both inside and outside your restaurant. An overloaded grease trap can contribute to:
- Slow kitchen drains
- Foul or rancid odors
- Grease and wastewater backing up through sinks or floor drains
- FOG buildup and blockages in drain or sewer lines
- Emergency plumbing repairs
- Sanitation and health-code concerns
- Compliance violations or fines
- Lost operating time
- The potential for temporary closure if a sewage backup creates an unsafe condition
That last possibility is especially important for restaurant owners. The Alabama Department of Public Health lists sewage backup among the conditions that require a food establishment to immediately cease operations, and operations may not resume until an inspection indicates that conditions constituting an imminent health risk and a substantial hazard no longer exist.
In other words, preventive grease trap maintenance can be much less disruptive than dealing with an overflowing floor drain during lunch service.
How Often Should a Restaurant Grease Trap Be Cleaned?
There is no single cleaning schedule that is right for every restaurant. How quickly a grease trap fills depends on several factors, including:
- Trap or interceptor size. A smaller grease trap may reach its capacity much faster than a larger, properly sized interceptor.
- Food volume. A restaurant serving hundreds of meals each day will generally produce more wastewater, grease and food solids than a low-volume café.
- Menu and grease output. Operations that prepare fried foods, meats, sauces and other grease-heavy menu items may accumulate FOG faster than businesses with lower-grease menus.
- Kitchen practices. Scraping dishes before washing, using sink strainers and properly disposing of fryer oil can help reduce the amount of grease and solids entering the trap.
- Actual accumulation. Your maintenance schedule should reflect what is happening inside your particular grease trap — not simply what another restaurant does.
What Is the 25 Percent Rule?
One of the most useful benchmarks for determining when a grease trap needs maintenance is the 25 percent rule.
For food service facilities within the MAWSS Grease Control Program, the published MAWSS Food Service Facility Grease Control Manual states that all traps must meet the 25% rule. The inspection compares the combined floating grease blanket and settled solids against the depth of the trap; if that combined accumulation exceeds 25 percent of the trap depth, the trap requires maintenance. The manual directs facilities to pump the grease trap before the grease and solids layers combined reach 25 percent of the depth of the trap.
MAWSS also requires food service facilities in its program to regularly inspect and maintain their grease traps and to document those inspections.
That does not mean every restaurant throughout Mobile, Baldwin and Washington Counties automatically follows exactly the same municipal requirements. Sewer utilities and health authorities can differ depending on where a property is located. For businesses outside the MAWSS service area, operators should confirm current requirements with their sewer utility and county health department.
Warning Signs Your Grease Trap May Need Service
Ideally, your grease trap is cleaned before it starts giving you trouble. But there are several warning signs that should not be ignored.
Watch for persistent kitchen odors, sinks that begin draining more slowly than usual, gurgling drains, standing water around floor drains or the grease trap area, grease showing up downstream from the trap, or recurring drain clogs.
A sudden increase in restaurant volume can matter, too. If your business has become significantly busier, added operating hours or changed to a menu that produces more grease, an old cleaning schedule may no longer be frequent enough. Repeated plumbing problems are another indication that the grease trap, interceptor or connected drain lines need to be evaluated.
What Does Professional Grease Trap Service Include?
A professional restaurant grease trap service visit should do more than remove a little grease from the surface. Depending on the type and condition of the system, professional service generally includes opening and inspecting the trap or interceptor, removing accumulated grease and solids, cleaning interior surfaces and accessible components, checking for visible damage or maintenance concerns, and documenting the service performed.
The MAWSS Food Service Facility Grease Control Manual states that minimum grease-hauler services should include complete removal of grease trap contents rather than skimming just the top grease layer, thorough cleaning of the trap to remove grease and scum from inner walls and baffles, disposal at the MAWSS designated public grease treatment facility, and properly maintaining the Grease Disposal Manifest.
Those records matter. Good documentation makes it easier for restaurant operators and commercial property managers to track how quickly a trap fills, establish a more appropriate recurring service schedule and provide maintenance records when required.
Staying Ahead of Grease Trap Compliance in Alabama
When it comes to grease trap compliance in Alabama, the safest approach is not to assume that a generic monthly, quarterly or annual schedule applies to every property.
Know the requirements of the health department and sewer utility serving your location. Keep records. Pay attention to grease accumulation. And adjust your cleaning frequency when your kitchen volume or grease production changes.
For restaurants served by MAWSS, the utility’s Pretreatment Program specifically addresses grease management for food service facilities and provides access to its Food Service Grease Control Manual. The Alabama Department of Public Health notes that the health department’s environmentalist can provide specific requirements for grease traps. For businesses elsewhere in Baldwin or Washington County, the applicable sewer utility may have its own requirements, so those should be confirmed for the individual property rather than assuming Mobile’s requirements apply.
Schedule Grease Trap Service Before It Becomes an Emergency
Restaurant owners already have enough to manage without adding a grease-related sewer backup to the list.
Roto-Rooter Plumbing & Water Cleanup has been serving the Gulf Coast since 1962. As a third-generation, locally owned family business, we understand how important it is to keep local restaurants, commercial kitchens and businesses running without unnecessary interruptions.
If it is time for grease trap maintenance — or you are not sure whether your current service schedule is keeping up with your restaurant’s needs — call Roto-Rooter Plumbing & Water Cleanup at 251-239-9163 to schedule service.
Sources
- MAWSS Food Service Facility Grease Control Manual (revised May 18, 2018)
- Alabama Department of Public Health — Establishment Closings
- Alabama Department of Public Health — Starting a Restaurant Business in Alabama
- Mobile County Health Department — New Business Compendium