Urgent plumbing help for leaks, drains, and sewer problemsPlumbing Service in Dallas-Fort Worth
Quick answer
A restaurant drain backup should be treated as urgent given health code, food safety, and service disruption risk. In the first few minutes: stop using any affected fixture (sink, floor drain, dishwasher, or toilet), keep staff and customers away from the area, document what you see with photos, and request a commercial emergency plumbing connection with details about which lines are affected and whether the backup involves the grease trap or a main line.
Every sink, floor drain, or dishwasher run adds more water to a line that is already backing up, and can push contaminated water further into the kitchen.
Block off the affected section from staff and customers. Wastewater backup - especially anything touching a floor drain tied to the sewer side - is a contamination risk, not just a mess.
Photos and a short written timeline (when it started, which fixtures, how far it spread) help with insurance, an inspector's questions, and giving a provider accurate information before dispatch.
If wastewater has reached food prep, storage, or a customer-facing area, that section should close until it is cleaned and the cause is resolved - this is a health code call, not just an operations one.
A home kitchen sink backup is usually a single clogged trap or branch line. A restaurant kitchen runs through a grease trap (also called a grease interceptor) first - a dedicated container that is supposed to let fats, oils, and grease (often shortened to FOG in city code documents) cool, separate, and stay out of the sewer line, while wastewater continues on to the main sewer connection. When a restaurant backs up, the cause is more often one of three things: the grease trap itself is full or near capacity, grease has hardened somewhere in the line between the kitchen and the trap, or - less commonly but more seriously - the main line past the trap has its own blockage or damage.
That distinction matters because the fix is different. A full trap needs pumping by a licensed liquid waste hauler. A blocked line or a trap that is cracked, undersized, or installed at the wrong grade needs a plumber. Treating a recurring backup as "just needs pumping" when the real problem is a line issue means paying for cleanings that never actually fix the problem.
Any commercial or institutional food service operation is required to have a grease trap. Dallas Water Utilities requires it to be fully emptied and cleaned by a licensed hauler at least every 90 days, or sooner if grease and sediment reach 25% of capacity, whichever comes first. Waste must go to a hauler licensed by both the Texas Commission on Environmental Quality (TCEQ) and Dallas Water Utilities.
Follows a similar 90-day (or 25% capacity) cleaning interval, and additionally requires a permit, inspection, and a minimum trap size - roughly 500 to 750 gallons depending on the type of establishment - at installation. Maintenance records must be kept on file for five years.
Sizes grease trap requirements based on the number and type of plumbing fixtures connected, and may require an undersized existing trap to be replaced. Neglected traps that contribute to a sanitary sewer overflow can carry city fines described as reaching into the thousands of dollars, on top of cleanup costs.
City ordinances change, and exact intervals, sizing tables, and fine amounts vary by city and over time - confirm current requirements directly with your city's water utilities or pretreatment program before relying on any specific number here.
When it is unclear which side of the trap the problem is on, that is itself useful information to give a provider when you request emergency service - it helps them bring the right equipment (a camera inspection can usually confirm the cause) instead of guessing on-site.
For a straightforward full trap, call your licensed grease hauler. For anything involving a suspected line blockage, damaged trap, or backup that a routine pumping did not fix, that is a plumbing call. If wastewater has already spread onto flooring, into walls, or under equipment, the plumbing side generally needs to be controlled first - stopping the source and clearing the line - before a water-restoration company can safely dry the space and check for hidden moisture. See our guide on who to call first after a leak or backup for more on that sequencing.
It depends on which fixtures are affected and whether wastewater has reached food prep, storage, or customer-facing areas. If a health inspector or your local health department would consider the area contaminated, close that section (or the kitchen) until it is cleaned and the backup is resolved - continuing to operate through visible sewage or grease overflow is a health code risk, not a judgment call worth gambling on.
Dallas requires grease traps to be fully emptied and cleaned by a licensed hauler at least every 90 days, or sooner if grease and solids reach 25% of the trap's capacity - whichever comes first. Fort Worth follows a similar interval and also requires permits, inspections, and a minimum trap size (roughly 500 to 750 gallons depending on the establishment) at installation. Arlington sizes grease traps based on fixture count rather than a flat minimum. Check with your specific city's water utilities or pretreatment program for the exact current rule, since intervals and paperwork requirements can vary by city and change over time.
Grease that escapes a trap and hardens inside city sewer lines is a leading cause of sanitary sewer overflows (SSOs), and DFW-area cities can issue fines - sometimes into the thousands of dollars - to the business responsible, on top of the cost of cleanup and any repair to your own plumbing. Maintenance records are also typically required to be kept on file (five years in both Dallas and Fort Worth), so a poorly documented trap can turn a single backup into a compliance problem during your next inspection.
It can be either, and the fix is different. A grease trap that is simply full needs pumping by a licensed liquid waste hauler, not a plumber. A backup caused by a cracked or misaligned trap, a blocked line between the kitchen and the trap, or a restriction further downstream in your main line is a plumbing problem. If pumping the trap does not resolve a slow or backed-up drain, or if the backup keeps recurring shortly after a routine cleaning, that points toward a line or grade issue that a plumber needs to diagnose, not a grease volume issue.
No - Fort Worth and Dallas both note that enzyme or chemical treatments are not an acceptable substitute for physically pumping and cleaning a grease trap under their code requirements, and relying on them can let a trap go over capacity without an obvious warning sign until a backup happens.
Many commercial property policies cover sudden water or sewage backup damage under a specific backup/overflow endorsement, but this is often an add-on rather than standard coverage, and policies frequently exclude damage caused by a lack of maintenance (like a neglected grease trap). Review your policy's sewer/drain backup endorsement and maintenance-exclusion language directly with your insurance agent before you assume a backup is covered.
Plumbing Hands connects Dallas-Fort Worth restaurants with commercial emergency plumbing providers for kitchen drain and grease-trap-adjacent line backups - the plumbing side of the problem (diagnosing whether it's a line blockage, a trap installation issue, or a main sewer problem, and clearing it), not the grease trap pumping itself, which is a licensed liquid waste hauler's job. Have your affected fixtures, how long the backup has been happening, and your last known grease trap cleaning date ready when you request service.
When you request help, have the affected fixtures, how long the backup has been happening, and your last known grease trap cleaning date ready - it helps a provider triage whether this looks like a trap, line, or main sewer issue before they arrive.
