Hydro Jetting for Grease Traps: What It Is, When You Need It, and What It Costs

If you run a commercial kitchen, you already know that regular grease trap pump-outs are part of the job. But sometimes a standard pump-out isn't enough. Grease hardens on pipe walls, builds up in corners your vacuum truck can't reach, and slowly chokes your drainage system until you're dealing with backups and foul odors that won't go away.

That's where hydro jetting comes in. It's the heavy-duty solution for grease lines and traps that need more than a routine cleaning — and understanding when to use it can save you thousands in plumbing repairs and emergency calls.

What Is Hydro Jetting?

Hydro jetting is a method of cleaning pipes, drains, and grease traps using highly pressurized water. A specialized nozzle is fed into the plumbing system and blasts water at pressures typically ranging from 1,500 to 4,000 PSI (pounds per square inch), stripping away grease, sludge, mineral scale, and debris from the interior walls of pipes and trap compartments.

Unlike a standard grease trap pump-out — which vacuums out the floating grease and settled solids from the trap itself — hydro jetting scours the actual pipe walls and interior surfaces. It reaches the hardened, baked-on grease that accumulates over months and years, the kind that no amount of pumping will remove.

Think of the difference this way: a pump-out empties the trap. Hydro jetting restores the trap and the connected lines to near-original condition.

How Does Hydro Jetting Work?

The process is straightforward, though it requires professional equipment and trained operators. Here's what's involved:

The Equipment

• High-pressure water unit: Either truck-mounted or trailer-mounted, these machines pressurize water and deliver it through heavy-duty hoses. Commercial units used for grease lines typically operate between 2,000 and 4,000 PSI with flow rates of 10 to 25 gallons per minute.
• Specialized nozzles: Different nozzle heads are used depending on the job. Forward-facing jets break through blockages, while rear-facing jets propel the hose forward and scour pipe walls simultaneously. Some nozzles are specifically designed for grease removal with rotating heads that provide 360-degree coverage.
• Camera inspection equipment: Many companies will run a video camera through your lines before and after jetting. The pre-inspection identifies the location and severity of buildup, and the post-inspection confirms the lines are clean.

The Process

1. Initial assessment: The technician inspects access points and may run a camera through the lines to evaluate the extent of grease buildup.
2. Setup: The jetting hose and appropriate nozzle are selected based on pipe diameter and the type of buildup present.
3. Jetting: The nozzle is inserted into the pipe through a cleanout or the trap opening. High-pressure water blasts grease and debris off pipe walls, pushing it downstream to be captured or vacuumed out.
4. Flushing and inspection: After jetting, lines are flushed with clean water and a final camera inspection may be performed to confirm the job is complete.

The entire process typically takes 1 to 3 hours for a standard commercial kitchen, depending on the length of the grease lines and the severity of the buildup.

When Do You Need Hydro Jetting vs. a Regular Pump-Out?

A regular pump-out on a consistent schedule is your first line of defense. But certain situations call for hydro jetting:

• Recurring clogs: If your drains keep backing up even after recent pump-outs, hardened grease inside the pipes is almost certainly the culprit. Pumping the trap doesn't address what's stuck to the walls of your grease lines.
• Slow drains after cleaning: You had the trap pumped last week, but the sinks still drain slowly. That tells you the problem isn't in the trap — it's in the lines feeding into or out of it.
• Severe or long-neglected buildup: If a trap or its lines haven't been properly maintained for an extended period, a pump-out alone won't restore proper flow. The accumulation on pipe walls needs to be physically removed.
• Health department or compliance issues: If an inspector flags your drainage system, hydro jetting is often the fastest way to get back into compliance and document that your lines are clear.
• Before a camera inspection: If you need a thorough video inspection of your grease lines (say, before buying a restaurant or after a plumbing issue), the lines need to be jetted first so the camera can actually see the pipe condition.

In short: pump-outs maintain your trap. Hydro jetting restores your entire grease drainage system.

Benefits of Hydro Jetting

Hydro jetting offers several advantages over pump-outs alone:

• Thorough cleaning: It removes hardened grease, calcium deposits, and sludge that vacuuming simply can't reach. Your pipes and trap walls come out genuinely clean, not just emptied.
• Extends the life of your trap and plumbing: Grease buildup accelerates corrosion and puts stress on pipe joints. Regular jetting keeps your system in better condition and delays costly replacements.
• Eliminates persistent odors: That lingering sewer smell that won't go away after a pump-out? It's usually caused by grease deposits rotting inside the pipes. Jetting removes the source.
• Improves drainage speed: Pipes with grease-coated walls have a smaller effective diameter. Jetting restores full flow capacity.
• Environmentally friendly: Hydro jetting uses only water — no harsh chemicals that can damage pipes or harm the sewer system.
• Preventive maintenance: Periodic jetting prevents the slow accumulation that leads to emergency clogs, sewer overflows, and five-figure repair bills.

How Much Does Hydro Jetting Cost?

For commercial grease lines and traps, expect to pay in the following ranges:

These costs are in addition to your regular grease trap pump-out fees. Some companies offer bundled pricing if you schedule jetting at the same time as a pump-out, which can save you 10-20% compared to booking them separately.

Factors that affect the price include the length of your grease lines, the pipe diameter, the severity of the buildup, your geographic location, and whether a camera inspection is included. Urban areas with higher labor costs tend to be on the upper end of these ranges.

How Often Should You Get Hydro Jetting Done?

Hydro jetting doesn't need to happen as frequently as regular pump-outs. For most commercial kitchens, a good schedule looks like this:

• High-volume kitchens (heavy frying, lots of grease output): Every 6 to 12 months
• Average restaurants: Every 12 to 18 months
• Low-grease establishments: Every 18 to 24 months

That said, the right frequency depends on your specific operation. If you maintain a strict grease trap maintenance routine — regular pump-outs, staff training on proper grease disposal, drain screens, and good kitchen practices — you can stretch the interval between jettings. If you're less consistent with maintenance, you'll need jetting more often.

A good rule of thumb: if your drains start slowing down between pump-outs, or you notice grease odors returning sooner than expected, it's time to schedule a jetting.

Can Hydro Jetting Damage Old Pipes?

This is a legitimate concern, and the answer is: it depends on the condition of your pipes.

Modern PVC, cast iron, and steel pipes in good condition can handle hydro jetting without any issues. The water pressure, while high, is well within what properly installed commercial plumbing is designed to withstand.

However, there are risks in certain situations:

• Corroded or deteriorated pipes: If your pipes are already weakened by years of corrosion, the high-pressure water could potentially cause a breach at a weak point. This is why a pre-jetting camera inspection is important — it lets the technician assess pipe condition before blasting.
• Very old clay or orangeburg pipes: Some older buildings still have clay tile or orangeburg (tar paper) sewer lines. These materials are fragile and generally should not be hydro jetted, or should only be jetted at reduced pressures by an experienced operator.
• Improperly joined or loose fittings: Pipes with loose joints or poor connections can be pushed apart by the water pressure.

Precautions to take:

1. Always request a camera inspection before jetting, especially if your building is more than 30 years old.
2. Hire an experienced, licensed company. Ask specifically about their experience with commercial grease line jetting — it's different from residential drain cleaning.
3. Make sure the company carries proper insurance. If something does go wrong, you want to be covered.
4. Ask the technician about the PSI they plan to use. A good operator adjusts pressure based on pipe material, diameter, and condition — they don't just crank it to maximum.

How to Find a Company That Offers Hydro Jetting

Not every grease trap cleaning company offers hydro jetting. It requires specialized equipment and trained operators, so it tends to be offered by larger or more established companies.

When looking for a provider, ask these questions:

• Do you have truck-mounted or trailer-mounted jetting equipment? (This matters — portable electric jetters used by some plumbers typically lack the power needed for commercial grease lines.)
• What PSI and flow rate does your equipment produce?
• Do you include a camera inspection before and after jetting?
• Are you licensed and insured for commercial grease trap and drain work?
• Can you provide references from other restaurants or food service clients?

The easiest way to start is to search for grease trap companies in your area and contact the ones that list hydro jetting among their services. You can also request a free quote and specify that you need hydro jetting — we'll connect you with providers who offer it.

The Bottom Line

Hydro jetting isn't something you need every month, but it's an essential part of a complete grease trap maintenance program. Regular pump-outs handle the day-to-day buildup. Hydro jetting handles everything else — the hardened grease on pipe walls, the slow accumulation that pump-outs miss, and the stubborn clogs that keep coming back.

Budget $300 to $600 for a standard jetting service, schedule it annually or semi-annually depending on your kitchen's output, and pair it with consistent pump-outs and good kitchen practices. Your drains will flow better, your trap will last longer, and you'll avoid the emergency calls that cost three times as much.

Ready to find a hydro jetting provider near you? Request a free quote from licensed companies in your area.

Related articles:

• Grease Trap Cleaning Cost in 2026: What Restaurant Owners Should Actually Expect to Pay
• Grease Trap Maintenance Tips: How to Keep Your System Running Smoothly