Commercial kitchen drain cleaning usually stops at the grease trap, and that’s where a lot of holiday backups start. A trap pumped right on schedule can still sit downstream of lines coated in hardened grease. Pumping empties the interceptor. It doesn’t touch the pipe.
Thanksgiving lands on November 26, 2026, and Houston kitchens are about to push more fryer oil and dish water through those lines than at any other point in the year. K&R Mechanical’s commercial hydro jetting service scours the lines themselves, so the trap isn’t the only thing standing between a packed dining room and a flooded floor drain.
Key Takeaways
- Houston requires grease interceptors to be fully pumped at least every 90 days. That’s Section 47-512(b) of the City Code, enforced through the Houston Health Department’s special waste program.
- Pumping cleans the trap, not the pipes. Grease that cools and sticks inside the lines between the sinks and the trap stays put after a pump-out.
- Hydro jetting uses high-pressure water to scour the full pipe wall, where a snake only punches a hole through the clog.
- Thanksgiving is November 26, 2026. Jetting in early November gets the lines clear before peak volume.
Why Don’t Grease Traps Catch Everything?
A grease trap has one job. Separation. It slows wastewater down long enough for grease to float and food solids to sink, so cleaner water heads to the sewer.
The catch? Grease starts cooling the moment it leaves a hot pan. Some of it hardens on the pipe walls between the sink and the trap, long before it ever reaches the interceptor. That layer builds slowly. A kitchen line can lose a big share of its opening without anyone noticing, right up until a busy Saturday when the floor drains start gurgling.
Here’s what a trap pump-out leaves behind:
- Upstream branch lines. Prep sinks and dish machines dump warm grease into these lines all shift, and it sets up before it ever gets to the trap.
- The trap’s own fittings. Inlet and outlet tees can clog even when the tank was just pumped.
- Downstream laterals, where grease that slips past the trap keeps coating the pipe all the way to the city main.
- Food solids. Rice and coffee grounds mix with grease into a paste that sticks to everything.
What Does Hydro Jetting Do That Snaking Doesn’t?
A drain snake (an auger or cable machine, depending on who’s talking) spins a cutting head through the clog. It opens a path. The grease around that path stays on the pipe wall, and the line can close back up quickly. A snake buys time.
Hydro jetting is a different animal. A technician feeds a high-pressure hose into the line through a cleanout. Rear-facing jets pull the hose forward and spray the pipe wall in every direction, stripping grease and scale off the inside of the pipe. Loosened debris washes back toward the cleanout or down the line (and out of the kitchen’s way).
Is Hydro Jetting Safe for Older Pipes?
Usually. But not without a look first.
Sound pipe handles jetting fine. Older cast iron lines with heavy corrosion or cracked joints are a different story, and they may need lower pressure or a repair before any jetting happens. A camera inspection settles the question. K&R Mechanical offers commercial camera line inspection, which shows the pipe’s condition and exactly where the grease is building up before a technician decides how to clean it.
How Do Houston’s Grease Rules Fit In?
Houston takes grease seriously. Under Section 47-512(b) of the City Code, every grease interceptor inside city limits has to be fully evacuated at least every 90 days unless the city approves a waiver. The Houston Health Department also requires the generator copy of each pump-out manifest to be returned within 15 days and kept on site for five years.
That’s the trap. Not the pipes. A kitchen can be fully compliant on paper and still back up the day before Thanksgiving.
Timing helps here. A kitchen that schedules its quarterly pump-out for early November can jet the lines in the same window, which clears both the trap and the pipe ahead of the busiest weeks.
Signs a Kitchen Line Needs Jetting Now
Some lines announce trouble well before they fail. These are worth a call:
- Slow floor drains. Water pooling around drains during the dish rush points to a narrowing line.
- Gurgling sinks or a sewer smell near the dish area.
- Repeat clogs. The same line snaked twice in a few months is a strong sign grease is lining the pipe.
- Water backing up into a floor sink right after the trap was pumped.
Can Jetting Happen Without Shutting the Kitchen Down?
In most cases, yes. Commercial jetting usually runs through exterior cleanouts, so the work can happen after close or before the morning prep crew shows up. K&R Mechanical runs 24/7, which makes it easier to book service around a holiday menu instead of in the middle of one.
Frequently Asked Questions
How often should commercial kitchen drain cleaning include hydro jetting?
Depends on volume. High-volume kitchens with heavy frying often jet quarterly, and some need it more often. Lighter-volume kitchens may get by with once or twice a year. Pairing the jetting with the 90-day trap pump-out keeps the schedule easy to track.
Does pumping the grease trap clean the drain lines?
No. Pumping empties the interceptor. Grease stuck to the pipe walls upstream and downstream of the trap stays there until the lines are jetted or cleaned some other way.
Is hydro jetting better than snaking for restaurant drains?
For grease, usually. A snake opens a hole through the clog and leaves the coating behind on the pipe wall. Jetting scours the full pipe wall, so the line holds its capacity longer between service calls. Snaking still has a place when a line needs a quick clear and jetting isn’t practical, but it isn’t a long-term fix for a grease problem.
Can hydro jetting damage old cast iron pipes?
It can if the pipe is already failing. That’s why a camera inspection comes first on lines with unknown condition. A sound pipe handles jetting without trouble, while a badly corroded or cracked pipe may need a repair or a lower-pressure approach.
Does K&R Mechanical offer hydro jetting outside business hours?
Yes. K&R Mechanical runs 24 hours a day, seven days a week, so jetting can be scheduled after close or before morning prep anywhere in the Houston area.
Schedule Holiday Drain Service With K&R Mechanical
K&R Mechanical handles commercial hydro jetting and camera line inspection for Houston restaurants and commercial kitchens. Grease trap service, too. Call K&R Mechanical at (281) 408-9414 to schedule commercial service before the holiday rush.