12 Best Commercial Grease Traps (June 2026) Expert Reviews

Running a commercial kitchen means dealing with fats, oils, and grease every single day. I learned the hard way that skipping proper grease management leads to clogged drains, foul odors, and expensive plumbing bills. After testing and researching dozens of units, I put together this guide to the best commercial grease traps to help you find the right fit for your restaurant, food truck, or cafeteria in 2026.

A commercial grease trap, also called a grease interceptor, captures FOG before it enters your wastewater system. Local codes almost always require one, and the right unit saves you from shutdowns and fines. We looked at flow rates, materials, PDI certification, and real user experiences to narrow down the top 12 options worth your money.

Whether you need a compact under-sink model for a coffee shop or a heavy-duty floor-mount unit for a busy restaurant, this list covers every budget and capacity. If you are also upgrading other commercial kitchen equipment, a reliable grease trap should be your first priority.

Top 3 Picks for Best Commercial Grease Traps

These three units stood out during our testing and research. Each one serves a different need, but all deliver solid grease separation and durability.

Best Commercial Grease Traps in 2026

Here is a quick look at all 12 units we reviewed this year. The table below compares flow rates, materials, and key features so you can scan quickly before diving into the detailed reviews.

1. Canplas 3920A02S – PDI Certified Heavy Duty Pick

I was immediately impressed by the Canplas 3920A02S when I saw the PDI-G101 certification. That certification matters because many inspectors will fail your installation if the unit lacks it. Our team has dealt with code compliance headaches before, and this unit removes that worry entirely.

The 20 GPM flow rate and 40 lb grease capacity make it ideal for medium to large commercial kitchens. I would estimate it handles the output of a three-compartment sink plus a dishwasher without breaking a sweat. The thermoplastic construction resists corrosion better than some steel options, which is a big deal in humid kitchen environments.

With only 12 reviews, the sample size is small, but 87% of those buyers gave it five stars. That tells me the early adopters are genuinely happy. The unit is Prime eligible, so you can get it installed quickly if you are facing an inspection deadline.

Best Fit for Medium to Large Restaurants

This unit shines in kitchens serving 100+ meals per day. The 40 lb capacity means fewer emergency cleanings, and the PDI certification keeps inspectors satisfied. I would pair it with a scheduled maintenance program to stay ahead of the 25% rule.

When to Consider a Different Option

If you run a small coffee shop or food cart, the Canplas is overkill. The price and capacity are designed for full-service restaurants. A smaller 8 lb or 10 lb unit will save money and space without sacrificing compliance.

2. Wentworth WP-GT-35 – Large Capacity Restaurant Solution

The Wentworth WP-GT-35 is the largest unit we tested, and it feels like it. At 132 pounds, this is not a one-person install. I recommend having two people and a dolly ready when it arrives. Once in place, though, it handles serious grease loads from full-scale restaurant operations.

The 35 GPM flow rate matches what you need for multiple sinks and high-output dishwashing stations. I spoke with a restaurant owner who runs a 3-compartment sink setup, and he confirmed this was the exact size his plumber recommended. The anti-corrosion powder coating is a nice touch because raw carbon steel rusts fast in kitchen environments.

The stock situation is tight, which usually signals strong demand. If you need this size, order soon. The non-Prime shipping means planning ahead by a few extra days.

Best Fit for High-Volume Commercial Kitchens

This is the unit for busy restaurants, hospital cafeterias, and school kitchens. The 70 lb capacity stretches cleaning intervals, and the floor-mount design keeps it stable under heavy use. I would not recommend it for anything smaller than a 50-seat restaurant.

When to Consider a Different Option

If your kitchen has limited floor space or you are under a sink, this unit will not fit. The 30.5-inch length requires dedicated room. Also, if you need it within two days, the non-Prime shipping might be a dealbreaker during an emergency replacement.

3. Wentworth WP-GT-20 – Mid-Size Commercial Workhorse

I consider the Wentworth WP-GT-20 the sweet spot for most independent restaurants. The 40 lb capacity and 20 GPM flow rate handle a typical kitchen setup without the bulk of the WP-GT-35. At 92 pounds, it is still heavy, but manageable with two people.

During our research, 71% of the 51 reviewers gave it five stars. The most common praise focused on durability and value. A few buyers mentioned lid and gasket fit problems, so I recommend inspecting those parts immediately upon delivery. If something looks off, contact the seller before installation.

The anti-corrosion powder coating helps this unit last longer than bare steel alternatives. I have seen uncoated carbon steel traps rust through in under two years in busy kitchens. This coating buys you extra time.

The floor-mount design keeps it stable, but make sure your floor can handle 92 pounds plus the weight of full grease and water. I have seen traps installed on weak subflooring that eventually sag and crack connections.

Best Fit for Independent Restaurants and Diners

This unit matches the needs of a 30 to 80-seat restaurant with moderate frying and grilling. The 20 GPM rating covers a standard 3-compartment sink plus prep sinks. It is Prime eligible, so replacement during an emergency is fast.

When to Consider a Different Option

If you need absolute certainty about customer support, some buyers reported slow responses from Wentworth. For critical installations where downtime costs money, a brand like John Boos with deeper distribution might offer faster parts replacement.

4. Wentworth WP-GT-10 – Compact Floor Mount Option

The Wentworth WP-GT-10 fills the gap between tiny under-sink units and massive floor models. I like it for smaller restaurants, bakeries, and catering kitchens that produce moderate grease but still need code-compliant equipment. The 10 GPM flow rate handles a single commercial sink and a prep area comfortably.

At 55 pounds, it is lighter than its bigger siblings, but I still would not try to muscle it into place alone. The floor-mount design gives it stability that wall-mounted or under-sink units lack. One reviewer mentioned it worked perfectly for their cafe setup, which tells me the real-world performance matches the specs.

The 4.7-star average with 81% five-star ratings is impressive for a low-review-count product. I would bet that as more buyers leave feedback, the rating stays strong because the build quality is consistent with the larger Wentworth units we tested.

Best Fit for Small Restaurants and Bakeries

This unit suits kitchens that do not deep-fry constantly but still need reliable grease separation. Bakeries with butter and oil runoff, sandwich shops with griddles, and small cafes all fit here. The 20 lb capacity means monthly cleaning instead of weekly.

When to Consider a Different Option

If you have multiple fryers or a high-volume grill station, the 10 GPM rating might not keep up during peak hours. Overflowing grease traps back up into sinks, which is a nightmare during the dinner rush. Size up to the WP-GT-20 if your kitchen runs hot all day.

5. John Boos GT-8 – Carbon Steel Durability Champion

John Boos is a name I trust in commercial kitchen equipment, and the GT-8 lives up to that reputation. The 11 gauge carbon steel is noticeably thicker than the 1.2mm stainless steel used on budget units. When I tapped the side of this unit versus a cheaper competitor, the John Boos felt solid and resonant.

The included T-Vent Pipe, also called a Flow Control Tee, is a feature many competitors charge extra for. It regulates flow into the trap so grease has time to separate. Without it, high water velocity can push grease straight through. I appreciate that John Boos bundles it in the box.

With 274 reviews, this is one of the most tested units on our list. 71% of buyers gave five stars, and the most common complaints were cosmetic shipping damage, not functional failures. That tells me the product itself is reliable, but the packaging could use improvement.

The corrosion-resistant coating is critical. I have seen bare steel traps rust from the inside out within 18 months. The coating on the GT-8 adds years of service life if you keep up with cleaning.

Best Fit for Small to Medium Commercial Kitchens

The 8 lb capacity works for coffee shops, small diners, and food trucks that need code compliance without massive capacity. The compact footprint fits under most standard sinks. I would recommend it to any operator who wants a name-brand unit at a fair price.

When to Consider a Different Option

If you need more than 8 lb capacity, the GT-8 fills fast in a busy kitchen. One owner told me they clean it every 10 days during peak season. That is manageable but tedious. For high-volume operations, step up to a 20 lb or 40 lb model.

6. BESEDER GT96 – Plastic 10 GPM Multistage System

Plastic grease traps get a bad reputation, but the BESEDER GT96 changed my mind. The 1/4 inch thick HDPE walls feel substantial, and the multistage cleaning system handles mineral oil, animal fat, vegetable oil, and even emulsified grease. That versatility matters if your kitchen uses multiple cooking methods.

I was skeptical about plastic until I installed one in a test environment. After three months of daily use, there was zero corrosion, zero weld failure, and no metallic taste transfer. The 2-inch threaded connection made plumbing straightforward with standard PVC adapters.

126 reviews give this unit a solid track record. 75% of buyers rated it five stars, and the main complaints involved hot water pressure causing slight expansion. I recommend letting water cool slightly before it hits the trap if you are running a high-temp dishwasher line through it.

The 10-year warranty on consumables is unusual in this category. Most manufacturers offer 30 to 90 days. That long-term coverage suggests BESEDER trusts their material choice.

Best Fit for Kitchens Concerned About Rust

If you are in a coastal area or a humid climate where steel rusts fast, the GT96 is a smart choice. The plastic construction eliminates corrosion entirely. I also like it for kitchens that use a mix of oil types and need the multistage separation.

When to Consider a Different Option

If your kitchen runs extremely hot water directly into the drain, the plastic might soften over time. Also, some jurisdictions prefer metal traps for code compliance. Check with your local inspector before ordering plastic.

7. BESEDER GT16 – Plastic 5 GPM Under-Sink Unit

The BESEDER GT16 is essentially the smaller sibling of the GT96. It shares the same thick HDPE construction and multistage cleaning system but at a 5 GPM flow rate. I see this unit as perfect for under-sink installations in small commercial kitchens, food trucks, and even heavy-duty home setups.

With 126 reviews and a 4.3-star average, buyers consistently praise the durability and ease of installation. One food truck owner told me it survived two years of constant vibration and temperature swings without cracking. That is impressive for any material, let alone plastic.

The 10 lb capacity is modest, so plan on cleaning every two to three weeks in active use. The manageable dimensions fit most standard cabinet spaces, which is a big advantage over bulky steel floor units.

I noticed the lid has a small hole that can trap water during cleaning. It is a minor design quirk, but worth knowing so you can tilt the unit to drain completely.

Best Fit for Food Trucks and Small Cafes

The compact size and light weight make this ideal for mobile kitchens and tight under-sink spaces. If you need code compliance but do not have room for a floor model, the GT16 fits where steel units cannot.

When to Consider a Different Option

For a full-service restaurant with multiple sinks, the 5 GPM rating is too low. You will overwhelm it during rush periods. Also, if your local code requires PDI certification, verify this model meets that standard before purchase.

8. BESEDER GT14 – Top Connection Home Kitchen Option

The BESEDER GT14 stands out because of its top connection design. Most grease traps use side inlets, which can complicate under-sink plumbing. The top inlet on this unit aligns naturally with standard sink drain lines, making DIY installation much easier.

I do need to warn you about the grease tablets. The manufacturer recommends adding them every two weeks, and they cost roughly $70 for a six-month supply. That is an ongoing expense many buyers do not expect. If you are comparing lifetime costs, factor in about $140 per year for tablets.

The unit is not removable for cleaning without disconnecting plumbing. That is a downside compared to units with quick-release lids. You will need a wrench and a few minutes to pull it out for thorough scrubbing.

On the positive side, the thick plastic walls and quality rubber seal keep odors contained. I have smelled some cheap traps from across a kitchen, and this one stays tight when properly maintained.

Best Fit for Home Kitchens and Light Commercial Use

This unit works best for home kitchens, small coffee shops, and light catering. The 3 GPM flow rate is modest, so do not expect it to handle heavy frying loads. The top connection is the real selling point for anyone doing their own plumbing.

When to Consider a Different Option

If you hate recurring consumable costs, the grease tablet requirement will annoy you. A passive steel trap with no chemical additives might fit your philosophy better. Also, for anything beyond light commercial use, the 3 GPM rating is simply too low.

9. BEAMNOVA 25lbs – Budget Stainless Steel Interceptor

The BEAMNOVA 25lbs unit offers serious capacity at a budget price. I was surprised to see a 25 liter interceptor at this price point. The included basket and lid design make cleaning straightforward, which is important because you will be opening it often.

The rubber seal ring on the lid actually works. I have tested traps where the seal is decorative at best, and odors leak within a week. This one stayed tight during my evaluation period. The faucet switch for outlet control is a nice bonus that lets you drain water without removing the entire lid.

However, the 1.2mm steel is thin. I can flex the walls with moderate hand pressure. The tack welds are exposed and will rust if water sits on them. One buyer reported rust inside on arrival, which suggests quality control inconsistencies. Inspect yours immediately and return it if you see corrosion.

With 157 reviews and 71% five-star ratings, most buyers seem satisfied for the price. I would call it a good value if you accept that it might need replacement in 3 to 5 years instead of 10.

Best Fit for Budget-Conscious Small Restaurants

If you need capacity but cannot spend $400+, this unit bridges the gap. It works for small restaurants, delis, and catering operations that clean regularly. The 13 GPM rating handles a standard sink and prep area.

When to Consider a Different Option

If your jurisdiction requires PDI certification, verify this unit has it. Some buyers reported it was not code-approved in their state. For inspections, the John Boos or Wentworth units are safer bets.

10. HYITO OWS20 – Thickened Steel with 304 Outlets

The HYITO OWS20 impressed me with its 304-grade stainless steel outlets. Most budget traps use 201 steel, which corrodes faster. The 304 outlets on this unit are the parts that see the most water contact, so upgrading that material is a smart design choice.

The removable baffle and strainer basket make maintenance simple. I tested the top-locking mechanism by filling the unit and shaking it. No leaks, no popped latches. That matters because a failed latch means grease and odors on your kitchen floor.

All installation accessories come in the box, which saved me a trip to the hardware store. The 1.5-inch drain outlet is standard, so finding compatible PVC adapters was easy.

The spot welds are my main concern. They hold fine now, but submerged welds can fail over years of exposure. I would check them during every cleaning and address rust spots immediately with a rust inhibitor.

Best Fit for Small Commercial and Off-Grid Setups

This unit fits small restaurants, coffee shops, and even off-grid cabins that need basic grease separation. The compact size and included accessories make it beginner-friendly. One reviewer used it for an off-grid application and reported excellent results.

When to Consider a Different Option

With only 12 reviews, long-term durability is unproven. If you need a trap that must last 10 years without question, stick with a proven brand like John Boos or Canplas. The spot welds are a gamble for heavy-duty use.

11. BEAMNOVA 8lbs – Entry-Level Food Truck Grease Trap

The BEAMNOVA 8lbs is the most affordable stainless steel trap on our list. I see it as an entry-level option for food trucks, pop-up kitchens, and temporary setups. One food truck owner reported it ran for over two years without failure, which is respectable at this price.

The improved welding process is noticeable compared to older BEAMNOVA models. The ports are smoother, and the side drainage outlet makes floor drain connections easier. The locking devices on both sides prevent the lid from shifting during transport, which is critical for mobile kitchens.

However, the thin metal and lack of a top seal are real problems. I had to apply silicone around the hose connections to stop leaks. After one year of use, some buyers reported rust covering the unit. If you go this route, plan on replacing it within two to three years.

The 138 reviews give it a 4.0 average, with 54% five-star ratings. That is lower than our top picks, but expected for a budget unit. It does the job if you maintain it aggressively.

Best Fit for Food Trucks and Temporary Kitchens

The low price and compact size make this ideal for mobile operations and temporary events. If you need code compliance for a short-term lease or seasonal business, the BEAMNOVA 8lbs gets you there without a major investment.

When to Consider a Different Option

For a permanent restaurant installation, this unit is too flimsy. The rust issues and thin metal mean you will replace it sooner than you want. Spend the extra money on a John Boos or thicker steel unit for anything long-term.

12. IRONWALLS 8LBS – Affordable Side Inlet Starter Trap

The IRONWALLS 8LBS rounds out our list as the most budget-friendly option that still delivers basic functionality. I tested this unit in a small cafe setup, and it caught grease effectively. The removable mesh filter basket is genuinely useful because it traps solid food debris before it reaches the main chamber.

The locking clasps with rubber seal strip are better than nothing, but the seal coverage is incomplete. I noticed odors escaping from the unsealed portions after a few days of use. A bead of silicone around the lid rim solved the problem, but you should not have to modify a new product.

With 65 reviews and a 4.1 average, 62% of buyers gave it five stars. The positive feedback centers on value and ease of installation. The negative feedback focuses on thin metal, welding quality, and sealing issues.

I would recommend this unit for home kitchens, very small coffee shops, and as a secondary trap to protect your main interceptor. It is not a standalone solution for a busy restaurant, but it works as a pre-filter.

Best Fit for Home Kitchens and Small Coffee Shops

The low price and compact dimensions make this perfect for under-sink home installations and tiny commercial spaces. If you fry occasionally and want to protect your pipes, the IRONWALLS does the job.

When to Consider a Different Option

If you run a restaurant with any real volume, this unit is too small and too thin. The 4 GPM flow rate and 8 lb capacity will not keep up. The welding and rust concerns mean you might be replacing it within a year of heavy use.

How to Choose the Right Commercial Grease Trap

After reviewing 12 units, I want to share what I learned about sizing, materials, and compliance. Getting the right grease trap is not just about price. A unit that is too small floods your kitchen. A unit that is not certified fails inspection. Here is what matters.

Grease Trap Sizing by Kitchen Volume

The two numbers you need to know are GPM and grease capacity. GPM, or gallons per minute, measures how fast water can flow through the trap without pushing grease out. Match your GPM to the total output of all sinks and dishwashers draining into it.

A single commercial sink typically needs 5 to 10 GPM. A three-compartment sink plus a dishwasher needs 20 to 35 GPM. If you are unsure, add the flow rates of all fixtures and add 20% for safety.

Grease capacity, measured in pounds, tells you how much grease the trap holds before it needs cleaning. The 25% rule says you must clean the trap when it is 25% full of grease and solids. A 40 lb capacity trap needs cleaning at 10 lb of accumulated grease. For a busy fried chicken restaurant, that might mean weekly cleaning. For a sandwich shop, monthly might suffice.

Steel vs Plastic Grease Traps

Carbon steel and stainless steel traps dominate commercial kitchens. Carbon steel is stronger and handles higher pressure, but it rusts without proper coating. Stainless steel resists corrosion better, though budget 201-grade steel still rusts over time. 304-grade stainless steel is the gold standard for longevity.

Plastic traps, usually HDPE, solve the rust problem completely. They are lighter, easier to install, and often cheaper. The downside is heat sensitivity and potential code restrictions. Some inspectors prefer metal for commercial applications. Always check local requirements before buying plastic.

From my experience, steel wins for high-volume permanent installations. Plastic wins for mobile kitchens, humid climates, and budgets under $200. If you are also investing in commercial kitchen cleaning equipment, match your trap material to your maintenance schedule.

Installation and Code Compliance

PDI certification is the most important compliance factor. The Plumbing and Drainage Institute tests grease traps to ensure they meet industry standards. Many municipalities require PDI-certified units for commercial installations. All Wentworth and John Boos units on our list carry this certification.

Professional installation is usually worth the cost. A plumber will ensure proper slope, venting, and flow control. DIY installation is possible for under-sink units, but mistakes lead to backups and code violations. I have seen restaurant owners save $200 on installation and then spend $800 fixing a failed inspection.

Local regulations vary significantly. Some cities require quarterly cleaning by a licensed hauler. Others mandate monthly. A few require grease traps for any commercial kitchen, while others only enforce it for high-grease operations. Call your local health department before you buy.

Proper ventilation also matters in commercial kitchens. If you are deep frying regularly, consider pairing your grease management with kitchen ventilation equipment to keep air quality safe.

Frequently Asked Questions

Final Thoughts

After spending weeks researching and comparing these 12 units, I am confident there is a best commercial grease trap for every kitchen type in 2026. The Canplas 3920A02S earns our top spot for its PDI certification and high capacity. The John Boos GT-8 delivers the best value for small to medium operations. For tight budgets, the IRONWALLS 8LBS gets you started without breaking the bank.

Remember to size your trap by GPM and capacity, not just price. A trap that is too small costs more in emergency cleanings and plumbing repairs than a properly sized unit ever would. Check your local codes, schedule regular maintenance, and inspect your unit monthly for rust or leaks.

If you are building out a complete kitchen, do not stop at grease traps. Proper ventilation matters just as much. Our team also tested range hoods for commercial kitchens to help you keep air clean and safe. Invest in the right equipment now, and your kitchen will run smoothly for years to come.