Grease Trap Jetting — How Hot Water Jetters Turn Restaurant Drains Into Recurring Revenue

If you’re not doing grease trap jetting for restaurants, you’re leaving serious money on the table. Every commercial kitchen in your service area has grease traps and drain lines that clog on a predictable schedule. That’s not a problem — that’s a business model. F.O.G. (fats, oils, and grease) builds up fast, and restaurant owners will pay you month after month to keep their drains flowing.

Let’s break down why grease trap work is one of the most profitable niches in the drain cleaning industry — and how the right sewer jetting equipment turns a one-time service call into a five-figure annual contract.

What Is Grease Trap Jetting?

Grease trap jetting uses a high-pressure hot water jetter to blast F.O.G. buildup out of grease traps, interceptors, and the drain lines that connect them. Restaurants, cafeterias, food trucks with permanent hookups, hotel kitchens — any commercial operation that cooks with oil or fat needs this service.

Here’s the thing most new contractors don’t realize: grease doesn’t just sit in the trap. It coats the inside of every drain line downstream. Over weeks, that coating hardens into a thick, pipe-narrowing layer that causes slow drains, backups, and eventually health code violations. That’s why restaurants need jetting on a monthly or quarterly schedule — not just when something goes wrong.

F.O.G. accumulation is also the #1 cause of sanitary sewer overflows in the U.S., which means municipalities are cracking down on restaurants that don’t maintain their grease infrastructure. Your service isn’t optional — it’s compliance.

Why You Need Hot Water for Grease Trap Work

Here’s where a lot of contractors get it wrong. They show up with a cold water hydro jetter, blast the grease, and call it done. But cold water doesn’t dissolve grease — it just pushes it downstream. That solidified F.O.G. re-deposits 20 or 30 feet down the line, and now you’ve got a callback.

Hot water at 140°F and above changes the game completely. At that temperature, grease transitions from a solid or semi-solid state back into a liquid. The high-pressure stream doesn’t just move the grease — it melts it off the pipe walls and flushes it out as liquid waste that flows to the treatment facility instead of re-solidifying in the line.

Think of it like washing a greasy pan. Cold water and soap? You’re scrubbing forever. Hot water? The grease slides right off. Same physics, bigger scale. That’s why a hot water jetter outperforms cold water every time on F.O.G. jobs. You get a cleaner result, fewer callbacks, and happier customers who actually renew their contracts.

Revenue Potential: The Numbers Don’t Lie

Grease trap jetting typically commands $350 to $800 per restaurant per visit, depending on trap size, line length, and your market. Most restaurants need service monthly or quarterly at minimum.

Do the math on just 10 restaurant contracts:

Schedule	Per Visit	Monthly Revenue (10 Restaurants)	Annual Revenue
Monthly	$350–$800	$3,500–$8,000	$42,000–$96,000
Quarterly	$500–$800	$1,250–$2,000	$15,000–$24,000

That’s from just 10 accounts. Scale to 25 or 30 restaurants and you’re looking at a six-figure revenue stream from grease work alone — recurring, predictable, and recession-proof. People don’t stop eating out.

Compare that to chasing one-off residential drain calls at $150 a pop. Restaurant contracts are where a drain line jetter pays for itself fastest.

The Right Equipment for Grease Trap Work

Grease trap jetting demands a machine that can deliver sustained hot water at serious volume. You want a minimum of 8 GPM to handle 4″ to 6″ grease lines effectively. Pressure matters, but flow rate is what actually moves debris out of the pipe.

Here’s what works for restaurant grease work:

Machine	Key Spec	Starting Price
HotJet II Single Axle	10 GPM @ 4,000 PSI, hot water	$52,995
HotJet II UHO	Enhanced hot water output	$59,995
HotJet II Diesel (Yanmar)	Hot water diesel-powered	$79,995
Ultimate Drain Cleaning Package	HotJet II + camera + locator + training	$62,995

For nozzles, use a Warthog-style rotating nozzle for main lines — it cuts through hardened F.O.G. like nothing else. For laterals and smaller branch lines, a standard rotating nozzle gives you the coverage you need without overkill. And don’t skip the bio-film removal — hot water breaks down the bacterial slime layer that cold water jetters leave behind.

How to Land Restaurant Contracts

You don’t sell grease trap jetting to the line cook. You sell it to property managers, franchise operators, and restaurant owners who are tired of emergency plumber bills at $200/hour on a Friday night.

Here’s a playbook that works:

• Target property managers first. One property manager with a strip mall of restaurants can hand you 4–6 accounts at once. They want one vendor, one invoice, zero headaches.
• Offer maintenance agreements. A 12-month contract with monthly or quarterly service at a fixed rate beats emergency pricing every time — for you and the customer. Lock in the recurring revenue.
• Use before-and-after camera inspections. Nothing sells a maintenance contract faster than showing a restaurant owner what their drain lines look like right now. A sewer camera paired with your hydro jetter is the ultimate sales tool. The Ultimate Drain Cleaning Package bundles both.
• Leverage health code compliance. Remind prospects that grease-related backups can trigger health department shutdowns. Your service is insurance against lost revenue.
• Start with one restaurant, then ask for referrals. Restaurant owners talk to each other. Do great work for one, and they’ll send you to the Italian place next door.

If you’re just getting into the drain cleaning business, grease trap work is one of the fastest paths to steady income. Check out our 7 startup tips for drain cleaning businesses for more on building your client base.

Frequently Asked Questions

How often do restaurant grease traps need jetting?

Most restaurants need grease trap jetting monthly. High-volume kitchens — think busy diners, fried chicken joints, Chinese restaurants — may need it every two weeks. Lower-volume operations like coffee shops or sandwich places can sometimes stretch to quarterly. The key is setting up a regular schedule before backups happen, not after. That’s what separates a maintenance contractor from an emergency plumber.

Can I use a cold water jetter on grease traps?

Technically, yes. Practically, you shouldn’t. Cold water pushes grease downstream where it re-solidifies and causes blockages further in the system. You’ll get callbacks, and the restaurant owner will blame you. A hot water jetter at 140°F+ actually dissolves the F.O.G. and flushes it out as liquid. The upfront investment in hot water sewer jetting equipment pays for itself in reduced callbacks and longer intervals between service visits.

Do I need special training for grease trap jetting?

You should absolutely get proper jetter safety training before taking on commercial grease work. High-pressure hot water is no joke — you’re dealing with 4,000 PSI at temperatures that can cause serious burns. Beyond safety, training teaches you the right nozzle selection, proper jetting techniques for different pipe sizes, and how to avoid damaging older cast iron lines. HotJet USA offers hands-on training classes that cover all of this.

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Ready to Take the Next Step?

Call HotJet USA today at 1-800-624-8186 to talk with a jetter expert. Whether you’re buying your first jetter or upgrading your fleet, we’ll help you find the right machine for your business. Visit hotjetusa.com to explore our full lineup.

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HotJet USA is the manufacturer of trailer mounted sewer and drain line jetters. For over 25 years, we’ve specialized in hot and cold water hydro jetting equipment — trailer mounted, skid mounted, and truck mounted. We also offer comprehensive jetter training classes. Call today for expert advice!