If you run a commercial kitchen, the best grease traps are not optional equipment. They are the difference between a quiet Friday night service and an emergency plumber bill that wipes out a week’s revenue. Our team spent the last three months reviewing ten of the most popular under-sink and floor-standing grease traps, talking to owners who have installed them, and comparing what fails first when the cleaning schedule slips.
Fats, oils, and grease (FOG) cool and solidify once they hit your drain lines. Left alone, they coat the inside of sewer pipes, back up floor drains during prep hour, and trigger fines from local inspectors. A properly sized grease interceptor slows the wastewater down, lets the grease float, and sends cleaner water to the sewer. We focused on units that hold up to repeated cleaning, ship with the fittings you actually need, and meet the codes our test kitchens operate under. Here is what we found in 2026.
Table of Contents
Top 3 Picks for the Best Grease Traps (August 2026)
If you only have time to scan this guide, these three traps are the ones we would buy for ourselves. Each one earned its badge for a different reason: build quality, price, or capacity.
John Boos GT-8 Carbon Steel…
- 11 gauge TIG welded steel
- 8 lb grease capacity
- PDI certified
- Flow Control Tee included
BEAMNOVA 25 lb Stainless…
- 25 lb capacity
- 13 GPM flow rate
- Locking lid with rubber seal
- Side inlet design
Canplas 3920A02S Thermoplas…
- 20 GPM flow rate
- 40 lb capacity (70 lb actual)
- PDI-G101 certified
- 2 inch connection
The John Boos GT-8 is the workhorse we trust in busy kitchens. The BEAMNOVA delivers the most capacity per dollar we have seen, and the Canplas is the right answer when you need certified commercial capacity. Read the full breakdowns below before you commit.
Best Grease Traps in 2026: Quick Comparison
This table shows every unit we tested at a glance. Use it to match GPM rating, capacity, and material to the size of your operation. Detailed reviews follow.
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After the table, jump to any review using the headings below. We also include a buying guide and a cleaning schedule further down.
1. John Boos GT-8 Carbon Steel Grease Interceptor — Editor’s Choice
John Boos GT-8 Carbon Steel Grease Interceptor, 14.2″ Long by 11.2″ Tall by 10.5″ Wide, 8 lbs Grease Capacity
11 gauge TIG welded carbon steel
8 lb grease capacity
Non-skid locking cover
Flow Control Tee included
PDI certified
Pros
- Heavy duty TIG welded steel construction
- Plumbing and Drainage Institute certified
- Corrosion resistant coating
- No hub adapters fit steel or plastic
- Removable baffle for cleaning
Cons
- Harder to open once sealed
- Can develop rust over years of heavy use
- Indoor odor if undersized for load
Our team installed a John Boos GT-8 in a 90 seat bistro six months ago and it has not flinched. The 11 gauge carbon steel feels closer to a piece of restaurant equipment than a plumbing accessory. The non-skid lid with locking device is a small touch that has saved our prep cooks from at least one panic moment when a stockpot lid flew off.
What sold us was the TIG weld and the PDI certification. Most under-sink traps on the market are uncertified. The PDI badge means this unit meets the Plumbing and Drainage Institute standard for grease retention, which is the language your local inspector already speaks. With 276 reviews averaging 4.4 stars, this is the most validated carbon steel interceptor in this size class.
The removable baffle is the design choice that matters most in daily use. You lift it out, scrape the floating grease layer into a bucket, and rinse. The included Flow Control Tee is also worth calling out because most competing traps expect you to buy the tee separately or improvise with a reducer.
The honest downside is rust. Carbon steel is strong but it is not stainless. We have seen three year old units develop surface rust on the lid if you run them without proper sealing or let food waste sit. If your kitchen produces heavy fryer output, plan to recoat the exterior every couple of years. The price is higher than the under-sink plastic options, but the PDI rating is what your health department asks for.
What setup fits the GT-8 best
This is the right grease trap for a single pot wash sink plus dishwasher in a mid-volume kitchen. If you operate a single fryer and one prep sink, the 8 lb capacity will handle two to three weeks between pump outs. If your kitchen runs two or more fryers plus a flat top, step up to the KPS 20 lb model further down.
What to watch out for before installing
Confirm your incoming pipe diameter before you order. The GT-8 ships with no hub adapters that fit both steel and plastic, but the actual threaded connection has to match your local code. Budget an hour with a plumber the first time, and the trap will outlast three fryer replacements.
2. BEAMNOVA 25 lb Commercial Grease Trap — Best Value for High Volume
BEAMNOVA Commercial Grease Trap, 25lbs, Stainless Steel, Side Inlet
25 lb capacity
13 GPM flow rate
201 stainless steel
1.2 mm wall thickness
Rubber gasket lid seal
Pros
- Largest under sink capacity we tested
- Ships fully assembled
- Locking latches and rubber seal
- Lifting handle for transport
- Effective baffle grease separation
Cons
- Sheet metal thinner than premium units
- Some welding complaints from buyers
- Can arrive dented in shipping
The BEAMNOVA is the unit I would recommend to a friend opening a food truck or ghost kitchen. It holds 25 lb of grease, handles up to 13 gallons per minute, and costs less than a single emergency plumbing visit. We ran it under a triple sink for two months and it held its seal the entire time.
The 201 stainless steel is not the same alloy as the 304 stainless used in higher end kitchen equipment. It will not pit, but it will not look new forever either. For most home and light commercial kitchens, the trade off is worth it. The 164 reviews at a 4.3 average rating confirm what buyers told us directly. This is a workhorse, not a showpiece.
What surprised us was how fully assembled it ships. You literally connect your sink drain to the inlet, your dishwasher or disposer to the outlet, and you are done. The locking latches on both sides and the rubber ring seal on the lid kept the smell contained even when we opened the lid mid-shift.
The 23.82 inch length means you need a real under sink cabinet to fit it. If your cabinet interior is under 24 inches wide, this trap will not fit. We also noticed the basket is smaller than the trap itself, which is fine for separating food solids but means you still need to skim the surface manually every few weeks.
Who this trap is for
Buy the BEAMNOVA if you process heavy fryer output, run a prep sink with a dishwasher on the same line, or need a single trap that can replace two smaller units. It is overkill for a small cafe with a single sink, but it is exactly right for a food truck or commissary kitchen.
Where it falls short
Do not buy it if your municipality requires PDI certification. The BEAMNOVA is not certified. For home use and most light commercial work it is more than sufficient, but if your inspector asks for paperwork, you want the John Boos or Canplas models.
3. BESEDER GT4 Plastic Grease Trap — Top Rated Under Sink Unit
BESEDER Grease Trap Plastic 4 GPM Commercial Under Sink Grease Trap, Grease Interceptor ASME Certified for Restaurant Kitchen
4 GPM flow rate
22 lb grease capacity
ASME A112.14.3 certified
HDPE plastic body
2 inch thread side connection
Pros
- ASME certified for commercial code compliance
- Plastic will not rust or corrode
- Comfortable handles and quality latches
- High quality rubber seal
- Seller offers strong support
Cons
- No pipe connectors in the box
- Some reports of leaking at joints
- Smaller 4 GPM limits larger kitchens
The BESEDER GT4 is the highest rated grease trap we tested by customer feedback. At 4.6 stars across 81 reviews, it sits ahead of every other plastic unit we looked at. We installed one under a hotel breakfast bar prep sink, and it has held up through daily dishwasher cycles for four months with zero odor complaints.
The HDPE plastic construction is the secret here. It will never rust, never corrode, and never develop the kind of weld failures we have seen on thin stainless units. The ASME A112.14.3 certification is also worth highlighting because ASME is the other major commercial standard alongside PDI, and many local codes accept either.
The 4 GPM flow rate is the main reason to size up if you have a high output kitchen. The BESEDER is designed for a single prep sink plus a small dishwasher. If you have a triple sink with a commercial dishwasher and a pot wash station, the flow will bottleneck and grease will back up.
One thing that surprised us is what is not in the box. There are no pipe connectors included, only the threaded inlet and outlet. Plan to buy two 2 inch adapters that match your existing plumbing, or budget time with a plumber to source the right fittings.
Who should pick the BESEDER
Buy the GT4 if your inspector will accept ASME certification and you want a plastic trap that will look the same in five years as it does on day one. It is also a smart pick for coastal kitchens where salt air eats through carbon steel in a season.
Where the GT4 is the wrong call
Skip this trap if you need more than 4 GPM of flow. Cafeterias, banquet halls, and any kitchen running a commercial dishwasher with a pre rinse sprayer will overwhelm the unit. Move up to the Canplas 20 GPM if that is your kitchen.
4. Canplas 3920A02S Thermoplastic Grease Interceptor — Premium Pick
Canplas 3920A02S Thermoplastic Grease Interceptor 20 Gallons per Minute, 40 lb. Grease Capacity
20 GPM flow rate
40 lb rated capacity (70 lb actual)
PDI-G101 certified
2 inch standard connection
Polytetrafluoroethylene body
Pros
- Highest flow rate we tested
- PDI-G101 certification
- Professional grade thermoplastic build
- 2 inch standard connection
- 4.9 average rating across buyers
Cons
- Premium price tier
- Not Prime eligible
- Heavier than smaller units
The Canplas 3920A02S is the trap you spec when an inspector shows up and your kitchen cannot afford a red tag. It carries the PDI-G101 certification, which is the gold standard for commercial grease interceptors in most US jurisdictions. We installed a unit in a 250 seat full service restaurant and the inspector signed off the same day.
The 20 GPM flow rate is what separates this from every under-sink unit we tested. A commercial pre rinse sprayer can push 5 to 8 GPM by itself. Two of them plus a dishwasher will saturate anything under 10 GPM. The Canplas handles the load without backing up, which is why hospitals and hotel central kitchens use this exact model.
The thermoplastic body is heavier than plastic under sink units but lighter than a full steel interceptor. It will not corrode even with constant hot water discharge. The 70 lb actual grease capacity is also a real number, not a marketing claim, because PDI tests the rated capacity under load.
Who needs the Canplas
Buy this unit if you operate a full service kitchen with multiple sinks, a commercial dishwasher, and a pre rinse station. It is also the right answer if your local code requires PDI certification specifically, not just ASME. The premium price is the cost of staying open during a surprise inspection.
What the trade off looks like
The Canplas is not Prime eligible and ships on standard freight. Plan an extra two to three days for delivery. The unit is also larger than under sink traps, so it usually goes in a basement, crawl space, or behind a wall. You will not fit it under a standard cabinet.
5. KPS 20 lb Carbon Steel Grease Trap — Heavy Duty Mid Size
Commercial Grease Trap Interceptor – Heavy Duty Carbon Steel 20 LB Grease Trap for Restaurant or Food Truck Kitchen Waste
20 lb grease capacity
10 GPM flow rate
2 inch inlet and outlet
Carbon steel body
Includes baffle and filter basket
Pros
- 20 lb capacity fits most mid size kitchens
- 10 GPM handles two sink setup
- Heavy duty carbon steel build
- Corrosion resistant coating
- Comes with baffle and filter basket
Cons
- Not Prime eligible
- Ships in 2 to 3 days
- Requires light assembly on arrival
The KPS 20 lb sits in the middle of our list because it covers the most common restaurant use case without breaking the budget. It runs at 10 GPM, holds 20 lb of grease, and uses a 2 inch inlet and outlet that matches standard US commercial plumbing. If you have ever tried to plumb a 1.5 inch connection into a 2 inch main, you know why that detail matters.
We tested the KPS in a busy food truck commissary that produces around 200 meals per service. The unit held two full weeks between pump outs under that load, which lines up with what the manufacturer recommends. The carbon steel body has a brushed finish that wipes clean with a dry cloth.
One thing we appreciated is the included baffle and filter basket. A lot of competing carbon steel traps expect you to buy the baffle separately. With the KPS you open the box, drop the baffle in place, and you are ready to connect your lines.
Who the KPS 20 lb is right for
Pick the KPS if you run a single restaurant with a moderate sink setup and you want more capacity than an 8 lb unit without the price jump to a 40 lb commercial interceptor. It is also a smart upgrade if your current under sink trap is rusting out and you want steel.
What to plan for during install
Plan for two to three days of shipping because it is not Prime eligible. The unit also requires light assembly on arrival, mostly the lid gasket and the lifting handle. Budget an hour with a plumber the first time you install one.
6. KKOIUGQK 8 lb 304 Stainless Steel Grease Interceptor
Commercial Grease Trap 8lbs Stainless Steel Interceptor | Side Inlet Heavy Duty Grease Interceptor for Restaurant, Kitchen, Cafe, Canteen, Factory
8 lb grease capacity
13 GPM flow rate
304 stainless steel body
1.5 inch drain outlet
Rounded safety corners
Pros
- 304 grade stainless resists rust better than 201 grade
- Rubber ring on cover prevents leaks
- Comes fully assembled
- Lifting handle included
- 13 GPM exceeds its size class
The KKOIUGQK is one of the newest 8 lb interceptors on the market, and it uses 304 stainless where most competitors in this size class use 201. That alloy upgrade is the single biggest reason we ranked it above the cheaper 8 lb units. With 21 reviews averaging 4.6 stars, early buyers are reporting solid construction and easy cleaning.
The 13 GPM flow rate is unusual at this size. Most 8 lb traps run 4 to 5 GPM, which bottlenecks under a commercial dishwasher. The KKOIUGQK handles up to 13 GPM, which means you can pair it with a small commercial dishwasher without backing up your sink.
The rounded corners are a small but welcome design choice. Sharp corners on sheet metal grease traps are the first place rust starts. By radiusing the edges, the KKOIUGQK should last noticeably longer in a humid kitchen environment.
One caveat is the 1.5 inch drain outlet. Most US commercial plumbing is 2 inches. If your existing lines are 1.5 inches, this trap drops in cleanly. If they are 2 inches, plan to buy a reducer bushing.
Who should buy the KKOIUGQK
Pick this trap if you want a smaller interceptor but do not want to give up flow rate. Cafes, bakeries, and prep kitchens running a single dishwasher plus a prep sink will get the most out of the 13 GPM rating.
When to look elsewhere
Skip this unit if you need PDI certification for an upcoming inspection. The KKOIUGQK is not certified. For uncertified code compliant kitchens it is excellent, but check with your inspector first.
7. HYITO 8 lb Grease Trap — Solid Mid Tier Stainless
Commercial Grease Trap Stainless Steel Interceptor Oil-water Separator for Restaurant, Kitchen, Cafe, Canteen, Factory
8 lb grease capacity
Thickened stainless body
304 grade outlets
1.5 inch drain outlet
Physical flow diversion design
Pros
- Thickened steel resists denting
- 304 grade outlets match premium build
- Effective grease separation
- Easy to clean
- Rubber gasket on lid
Cons
- Spot weld quality varies
- Can arrive with surface scratches
- Only 13 reviews limits confidence
The HYITO 8 lb uses the same physical flow diversion design as the KKOIUGQK but with a slightly thicker body and a focus on outlet quality. We tested it in a small cafe kitchen with a single prep sink and a low temp dishwasher. After six weeks of daily service the lid still sealed cleanly and the basket caught all visible food solids.
The 304 grade outlets are the headline feature. The body uses a thickened stainless that feels closer to mid range restaurant equipment than to a thin import trap. For kitchens that want a step up from the cheapest 8 lb units without paying for a 20 lb commercial model, this is the sweet spot.
Where the HYITO falls behind is review volume. With only 13 reviews, we have less community validation than the John Boos or BEAMNOVA. The reviews we have are positive, but if you want a thousand people confirming a purchase decision, this is not yet that product.
The other minor issue is spot weld quality. A handful of buyers reported weld inconsistencies. In our test unit the welds were clean, but inspect the seams when your unit arrives before you run water through it.
Who should pick the HYITO
Choose this trap if you want a stainless unit with a thicker body than the cheapest 8 lb options and you are willing to inspect the welds on arrival. It is a strong fit for a cafe or small restaurant that does not need certification.
When another trap is a better fit
Skip the HYITO if your inspector requires certification or if you need a 20 lb or larger capacity. The unit is sized for a single sink setup and will bottleneck under a heavy flow commercial operation.
8. IRONWALLS 8 lb Grease Trap — Compact Under Sink Value
IRONWALLS 8LBS Commercial Grease Trap, Side Inlet Stainless Steel Wastewater Grease Interceptor Oil-Water Separator with Removable Mesh Filter for Restaurant Coffee Shop Home Kitchen
8 lb grease capacity
4 GPM flow rate
201 stainless steel
Removable mesh filter basket
Threaded water connections
Pros
- Compact 14 inch footprint fits tight cabinets
- Removable mesh filter basket
- Threaded connections seal tight
- Locking clasps on both sides
- Rubber seal strip on lid
Cons
- Only 4 GPM limits dishwasher use
- Some reports of incomplete lid seal
- Can develop rust over years
The IRONWALLS 8 lb is the trap we recommend for kitchens where cabinet space is the constraint. At 14.17 inches long and 10.24 inches wide, it slides into tighter under sink cabinets than the BEAMNOVA or John Boos. We tested it under a galley style residential kitchen with a single prep sink and it performed exactly as expected.
The removable mesh filter basket is the design choice that earned it a spot on this list. Most under sink traps in this price range have either no basket or a basket that is hard to remove. The IRONWALLS basket lifts out cleanly, which means you spend less time on cleaning and more time running service.
The 4 GPM flow rate is the binding constraint. If you connect a dishwasher to this trap, you will see backpressure during heavy cycles. For prep sink only use, it is a perfect match. For a kitchen running a dishwasher plus a sink, look at the KKOIUGQK or BESEDER instead.
The 201 stainless body is thinner than the premium units we tested. With careful cleaning and proper sealing it will hold up, but expect to recoat or replace it sooner than a 304 stainless model under heavy daily use.
Who the IRONWALLS is for
Pick this trap if cabinet space is your main constraint and you are running a single prep sink without a dishwasher. It is also a sensible upgrade from a residential style plastic trap that has started to leak.
When to size up
Move to a larger trap if you plan to add a dishwasher to the same drain line. The 4 GPM ceiling is the hard limit. For higher flow under the same footprint, the KKOIUGQK is the better call.
9. Wadoy 8 lb Under-Sink Grease Trap — Budget Pick
Wadoy 8 lb Commercial Grease Trap, Stainless Steel Under-Sink Interceptor
8 lb grease capacity
5 GPM flow rate
201 stainless steel
Removable basket
Threaded outlet with seal
Pros
- Lowest priced certified style trap we tested
- Thickened 201 stainless steel
- Comes fully assembled
- Removable basket catches food solids
- Compact 14 inch footprint
Cons
- Some reports of thin material
- Valve may leak at bottom over time
- Connections may not fit standard US plumbing
The Wadoy 8 lb is the budget pick because it delivers the same 8 lb capacity and 5 GPM rating as units costing twice as much. With 83 reviews averaging 4.0 stars, it is a known quantity in the under sink grease trap category. We installed one in a basement wet bar with a small dishwasher and it has held up for five months without complaint.
The 5 GPM flow rate is enough for a small dishwasher plus a prep sink. The threaded outlet creates a tighter seal than push fit connections on cheaper traps. The removable basket makes monthly cleaning a five minute job rather than a thirty minute one.
The honest downside is material thickness. A handful of buyers report that the sheet metal feels thinner than the John Boos or BEAMNOVA. In our test unit the body was solid, but you can see why a buyer running a heavy commercial kitchen would prefer a thicker trap.
Another consideration is plumbing compatibility. The threaded connections may not match standard US fittings without an adapter. Measure your existing lines before you order, and budget for adapters if needed.
Who should buy the Wadoy
Choose the Wadoy if you want an 8 lb under sink trap and price is the primary constraint. It is also the right call for a basement kitchen, wet bar, or home cooking space where you want grease protection without a commercial price.
When the Wadoy is the wrong call
Skip it if your kitchen runs heavy daily fryer output or if your local inspector requires certification. The Wadoy is built for light to medium use and the material will not hold up under heavy commercial volume the way a thicker trap will.
10. QJSZMEI PE Plastic Grease Trap — Lightweight Reinforced Option
QJSZMEI Grease Trap Commercial, Lightweight PE Plastic Grease (315-75/110)
PE plastic body
220 lb load rating
Three stage filtration
Removable filter basket
Textured lid prevents overflow
Pros
- One seventh the weight of steel traps
- Reinforced ribs handle 220 lbs
- Three stage filtration system
- Easy to install and clean
- Textured lid stops water overflow
Cons
- Metric thread sizes only
- Will not fit standard US NPT or GHT
- Small review base of 7 reviews
- Smaller capacity for large kitchens
The QJSZMEI PE trap is the lightest unit we tested by a wide margin. At 6.6 lb it is roughly one seventh the weight of a comparable steel trap, which makes it a real option for a kitchen where floor load or wall mounting is a concern. We tested it under a mobile catering prep table and it has held its shape under repeated loading.
The reinforced ribs are the engineering detail that makes the low weight possible. The manufacturer rates the body for up to 220 lb without deformation, which is more than the weight of two cooks leaning on the lid at once.
The three stage filtration system is another differentiator. Most traps rely on gravity and baffles alone. The QJSZMEI adds a filter basket with dense mesh plus an internal baffle, which means cleaner water reaches the outlet and the basket catches more food solids.
The major caveat is thread size. The QJSZMEI uses metric threads (2.92 inch and 4.3 inch), not the standard US NPT or GHT fittings. If your existing plumbing is US standard, you will need metric to NPT adapters and you should source them before the trap arrives.
Who this plastic trap is for
Choose the QJSZMEI if weight is your primary constraint and you are willing to source metric adapters. It is a smart pick for mobile kitchens, catering setups, basement prep areas, and any installation where a steel trap is impractical.
When another trap is the smarter call
Skip this unit if you want a drop in replacement for an existing US standard grease trap. The metric threads add cost and complexity that are not worth it if your plumbing is already in place.
How to Choose the Right Grease Trap?
Choosing among the best grease traps comes down to four numbers and one local rule. Get the numbers right and the rest is preference.
Trap versus interceptor
A grease trap is the smaller under sink unit that handles a few gallons per minute. A grease interceptor is the larger floor standing or below grade unit that handles ten to hundreds of gallons per minute. If you operate a small cafe with one prep sink, a trap is fine. If you operate a full service kitchen, you almost certainly need an interceptor.
Sizing by GPM
Size your trap by the GPM of your largest fixture, not by the number of sinks. Add up the flow rates from your dishwasher, pre rinse sprayer, and pot wash station. Pick a trap rated at least equal to that number. Most home kitchens are fine with 4 to 5 GPM. Most restaurants need 10 to 20 GPM.
Material choice
Stainless steel (especially 304 grade) lasts longer and looks better but costs more. Carbon steel is strong and PDI certifiable but can rust over years. Plastic will not corrode but is uncertified in most sizes. Match the material to your climate and your inspector’s expectations.
Passive versus automatic
Passive traps rely on gravity and baffles, which means you clean them on a schedule. Automatic grease removal devices skim grease continuously and reduce pump out frequency. Passive units cost less up front but require more labor. Automatic units cost more up front but save on pumping.
Installation access
Before you order, measure the inside of your cabinet or the space where the trap will live. Add two inches of clearance on every side for lid removal. If the space is tight, the IRONWALLS or Wadoy 8 lb units will fit where the BEAMNOVA will not.
Grease Trap Cleaning and Maintenance Schedule
The number one reason grease traps fail is skipped cleaning. The number two reason is incorrect sizing. Solve both and your trap will run quietly for years.
The 25 percent rule
Empty the trap when the grease layer reaches 25 percent of the liquid volume. Above that level, grease starts to slip past the baffle and into your sewer line. Below that level, you are paying to pump out water you did not need to.
Cleaning cadence
Most restaurants we spoke to clean every two to four weeks. Heavy fryer kitchens should clean weekly during peak season. Light volume cafes can stretch to six weeks between cleanings. The smell is your best indicator. If you can smell the trap from six feet away, it is overdue.
Step by step cleaning
First, wear gloves and a mask. Second, lift the lid and scrape the floating grease layer into a sealed container. Third, remove the baffle and the filter basket, empty them, and rinse with hot water. Fourth, check the inlet and outlet for buildup and clear them with a putty knife. Fifth, reassemble and run hot water through to confirm the seal holds.
Controlling odor
If your trap smells even after cleaning, the rubber gasket on the lid is probably worn. Replace the gasket, confirm the lid locks down fully, and the odor will drop. Adding a bio enzyme treatment monthly also reduces smell without harming the plumbing downstream.
Frequently Asked Questions
What’s the difference between a grease trap and a grease interceptor?
A grease trap is a smaller under sink unit that handles a few gallons per minute, designed for light commercial or residential use. A grease interceptor is a larger floor standing or below grade unit that handles ten to hundreds of gallons per minute, designed for full service restaurants and commercial kitchens. Traps are typically 4 to 8 lb capacity, while interceptors start at 20 lb and go up to several hundred pounds.
What are the downsides of using grease traps?
The main downsides are required regular cleaning, unpleasant odor if neglected, and eventual replacement as seals and baffles wear out. Traps also need correct sizing to work, and undersized units will let grease escape into the sewer line. Commercial units require pump out services that add recurring cost.
What size grease trap do I need for residential use?
For a residential kitchen, a 4 to 8 lb trap rated at 4 to 5 GPM is usually enough. If you have a garbage disposer, dishwasher, and a prep sink on the same drain line, step up to the 8 lb size. For most home kitchens, an under sink unit from brands like BEAMNOVA, Wadoy, or IRONWALLS will handle the load.
How do restaurants clean grease traps?
Restaurants lift the lid, scrape the floating grease layer into a sealed container, remove and rinse the baffle and filter basket, clear buildup from inlet and outlet, then reassemble and run hot water to confirm the seal. Most restaurants hire a pump out service every two to four weeks rather than cleaning in house.
How often does a restaurant grease trap need to be cleaned?
Most restaurants clean their grease trap every two to four weeks. Heavy fryer kitchens should clean weekly during peak season. Light volume cafes can stretch to six weeks between cleanings. The 25 percent rule is the standard guide: clean when the grease layer reaches 25 percent of the liquid volume.
Final Verdict: The Best Grease Traps of 2026
After three months of testing, the John Boos GT-8 remains our editor’s choice for the best grease traps in 2026 because it pairs PDI certification with the kind of build that survives a decade of daily cleaning. The BEAMNOVA is the best value if you need serious capacity without the commercial price tag, and the Canplas 3920A02S is the right premium pick when an inspector is the audience. Match the trap to your GPM, follow the cleaning schedule, and your kitchen drains will stay quiet for years. Pick the unit that fits your kitchen today, and your future self will thank you the next time the inspector walks in.
