Grease Trap Cleaning in Tyler & East Texas

Who this applies to

This mainly applies to restaurants, cafes, bars, food trucks with a fixed commissary connection, school and hospital kitchens, and any other food service business connected to a public sewer system. Homes and businesses that run on a private septic system instead of city sewer follow different rules; see septic tank pumping for that side of wastewater maintenance.

What a grease trap does

A grease trap (or grease interceptor, for larger installations) sits in the wastewater line between a commercial kitchen and the sewer connection. As warm, greasy wastewater flows through, it cools and the fats, oils and grease (FOG) separate out and float, while solids settle to the bottom. Only the cleaner water in between continues on to the sewer.

Without this step, FOG travels down the line, cools further, and solidifies onto the inside of pipes. That’s one of the most common causes of sewer line blockages and overflows, which is exactly what pretreatment programs are meant to prevent for restaurants and other commercial food service dischargers.

Why cleaning schedule matters

The EPA’s National Pretreatment Program is a joint federal, state and local framework that regulates what commercial and industrial users, including restaurants, can discharge into public sewer systems. Under this framework, individual cities set their own local limits and requirements, which typically includes how often a grease trap or interceptor has to be cleaned and whether records need to be kept.

That means the exact cleaning interval for your business depends on your city’s pretreatment program and your trap’s size and grease load, not a single nationwide number. Confirm your required interval with your local water utility, since missing it can mean a citation on top of the cost of clearing a blockage.

Signs your grease trap needs attention sooner than scheduled

Slow-draining kitchen sinks or floor drains
A sewage or rotten-grease odor near the kitchen drains
Grease visibly backing up into a sink
A health inspector or plumber flagging a trap that’s clearly past due

How grease trap cleaning works

Locating and opening the trap. Traps are typically installed under a sink or as an in-ground interceptor outside.
Measuring and pumping. A technician measures the grease and solids layer, then pumps out the accumulated waste.
Cleaning trap surfaces. Interior walls and baffles get cleaned so grease doesn’t recoat them immediately.
Disposal. Removed grease and solids are hauled away and disposed of according to local and state waste rules.
Documentation. You should get a service record, since many pretreatment programs require businesses to keep proof of regular cleaning on file.

Grease trap vs. septic tank

	Grease trap / interceptor	Septic tank
Purpose	Removes fats, oils and grease before sewer discharge	Treats and disposes of all household or business wastewater
Connects to	City sewer line	Private drain field (no city sewer)
Who typically needs one	Restaurants and food service businesses on city sewer	Properties outside city sewer service
Regulated by	City pretreatment program	TCEQ (state) and local permitting authority

If your business is on a septic system rather than city sewer, see septic tank pumping and septic repair for what applies instead.

Under-sink traps vs. in-ground interceptors

	Under-sink grease trap	In-ground grease interceptor
Typical size	Small, a few gallons	Large, hundreds to thousands of gallons
Location	Under or near the kitchen sink	Buried outside, inline before the sewer connection
Best suited for	Small kitchens, food trucks, low-volume operations	Restaurants, commercial kitchens, high-volume operations
Cleaning frequency	More frequent due to smaller capacity	Less frequent, but larger service when due

A new restaurant build or a kitchen remodel is usually when the choice between the two gets made, based on expected kitchen volume and what your local pretreatment program requires for a business your size.

What a technician looks for beyond just the grease

A thorough cleaning visit doesn’t stop at pumping out the trap. A good technician also checks:

Whether the baffle or flow-control fitting inside the trap is intact and positioned correctly
Signs of a slow leak or corrosion on an older in-ground interceptor
Whether the trap is sized correctly for your current kitchen volume (a trap installed for a smaller menu or lower volume than you’re now running fills faster than expected)
Any odor or backup risk building in the line just past the trap

Staying compliant without the guesswork

Rather than guessing at a schedule, ask your city’s water utility or pretreatment program directly what interval and recordkeeping your permit requires, then set your cleaning visits to that schedule with some buffer. Keeping copies of every service record on-site (many programs expect them available for a health or pretreatment inspection) protects you if a question ever comes up about compliance.

Staying ahead of an inspection or a backup

A grease trap that’s cleaned on schedule protects your kitchen from slow drains and backups and keeps you in good standing with your city’s pretreatment requirements.

Common questions

Why do restaurants need a grease trap?

A grease trap or interceptor catches fats, oils and grease (FOG) from kitchen wastewater before it reaches the sewer line. Without one, FOG cools and solidifies inside pipes, which is a leading cause of sewer line blockages and overflows, something the EPA's pretreatment program is specifically designed to prevent for commercial and industrial dischargers.

How often should a grease trap be cleaned?

It depends on the trap's size and how much grease your kitchen produces, which is exactly what a local cleaning schedule should be based on. Many pretreatment programs set a required cleaning frequency for food service businesses, so check with your city's water utility or pretreatment program for the specific interval that applies to your permit.

What happens if a grease trap isn't cleaned regularly?

Grease builds up until it overflows the trap and enters the sewer line, where it can cause blockages and backups, both in your own plumbing and potentially in the municipal system downstream. Cities can cite or fine businesses that cause a sewer blockage traced back to an uncleaned trap, on top of the cost of clearing the resulting backup.

Is a grease trap the same as a septic tank?

No. A septic tank treats and disposes of all wastewater from a property that isn't connected to city sewer. A grease trap or interceptor is a pretreatment device that sits inline before wastewater reaches the sewer connection, and it only targets fats, oils and grease from a kitchen, not full wastewater treatment.

Do I need a permit for a grease trap?

Cities that operate a wastewater pretreatment program under the EPA's National Pretreatment Program framework typically require food service businesses to install and maintain a grease trap or interceptor as a condition of their sewer connection. Requirements and permit steps are set locally, so confirm with your city's water utility or pretreatment program before installing or resizing one.