Choosing the right grease interceptor can help keep your kitchen draining smoothly and reduce costly clogs, backups, and compliance headaches.
Below, we’ve rounded up 10 of the best options for restaurant kitchens, with a focus on capacity, flow, durability, and ease of installation.
Best 10 Restaurant Grease Trap Under Sink Picks for 2026
Upgraded Heavy-Duty Pick
BEAMNOVA 25lb Stainless Steel Side-Inlet Trap
- 25 lb capacity and 13 GPM flow
- 1.2mm stainless steel with anti-rust build
- Fully assembled with seals and accessories
Best For: Busy kitchens needing a larger stainless steel under-sink interceptor
Certified Budget-Safe Choice
BESEDER 4 GPM Plastic Under-Sink Trap
- ASME A112.14.3 compliant
- Compact 4 GPM under-sink design
- Thick-wall HDPE with sealed lid and latches
Best For: Compact commercial kitchens that need ASME-certified plastic construction
High-Flow Stainless Option
25lb 13 GPM Under-Sink Stainless Interceptor
- 13 GPM flow rate
- Thickened 201 stainless steel
- Removable basket for easier cleaning
Best For: Restaurants and commercial sites that want a simple stainless steel interceptor
Compact Filtration Pick
DYNAMI 8-10lb Stainless Steel Grease Trap
- Compact 13.8 x 9.8 x 9 inch size
- Four-stage filtration system
- Stainless steel body with reliable seals
Best For: Smaller kitchens needing a compact multi-stage interceptor
Compact Three-Stage PE Separator
Commercial Grease Trap, PE Plastic Side Inlet
- 3-stage separation with removable basket
- Thickened PE body supports up to 220 lbs
- Compact under-sink fit with side inlet
Best For: Lightweight under-sink use in smaller commercial kitchens
Heavy-Duty Carbon Steel Interceptor
Wentworth 8 Pound Commercial Grease Traps
- PDI certified 11-gauge carbon steel build
- 4 GPM flow rate with 8 lb capacity
- Threaded ports and sealing ring help reduce leaks
Best For: Durable commercial installations that need certification and higher flow
Space-Saving Four-Stage Steel Separator
Commercial Grease Trap, 4-Stage Stainless Steel Under Sink Interceptor
- Four-stage chamber design with removable baskets
- Corrosion-resistant stainless steel construction
- Compact under-sink footprint with sealed gaskets
Best For: Limited-space kitchens that want a compact stainless under-sink interceptor
Stainless Steel Pick
Wadoy 8 lb Commercial Grease Trap
- 201 stainless steel body with rust resistance
- Fully assembled with removable basket
- Threaded outlet and sealing rings help limit leaks
Best For: Compact home or restaurant installs that need strong sealing
High-Flow Upgrade
BEAMNOVA Commercial Grease Trap
- Up to 13 GPM flow for heavier use
- Fully assembled 201 stainless steel build
- Side outlet adds drain-routing flexibility
Best For: Busy kitchens needing higher flow and flexible drainage
Multi-Stage Filter Choice
Gerrii 7.6 Gallon Commercial Grease Trap
- 7-stage filtration targets grease, oil, and solids
- Durable HDPE build with removable basket
- Space-saving under-sink layout for compact kitchens
Best For: Compact commercial kitchens that value multi-stage filtration
Upgraded Heavy-Duty Pick – BEAMNOVA 25lb Stainless Steel Side-Inlet Trap
If you need a restaurant grease trap under sink that can handle commercial use, this BEAMNOVA unit focuses on capacity, durability, and easier installation. Its 25 lb size, stainless steel body, and side inlet setup make it a practical option for kitchens, food trucks, and other busy spaces where you want reliable grease separation and fewer leaks.
Best For: High-volume kitchens that want a stainless steel under-sink interceptor with a larger capacity and simple installation.
Pros:
- 25 lb capacity with up to 13 GPM flow
- Heavy-duty 1.2mm 201 stainless steel construction
- Fully assembled with outlet pipe and accessories included
- Rubber-ring sealing and locking devices help reduce leakage
Cons:
- Size should be checked carefully against your available space
- Local regulations may affect suitability
Overall, this is a strong pick if you want an industrial-style grease trap with practical handling features and a focus on smoother installation. The rounded corners, sealed faucet, and improved welding add convenience, but the dimensions make measuring your setup an important first step.
Certified Budget-Safe Choice – BESEDER 4 GPM Plastic Under-Sink Trap
This restaurant grease trap under sink is aimed at commercial kitchens that want a compact, certified plastic interceptor. The BESEDER unit uses thick HDPE construction, a side inlet with 2-inch threading, and a 4 GPM design that fits smaller under-sink spaces while still meeting ASME A112.14.3 requirements.
Best For: Restaurants and foodservice spaces that need an ASME-certified, compact plastic grease trap with straightforward setup.
Pros:
- ASME A112.14.3 compliant for commercial installations
- Durable plastic construction with 1/4-inch wall thickness
- Compact dimensions suited for under-sink placement
- Includes handles, lid, latches, rubber seals, and adapter fittings
Cons:
- 4 GPM flow is lower than larger commercial units
- Plastic build may not suit buyers who prefer stainless steel
For buyers focused on certification and space-saving dimensions, this model offers a practical balance of durability and compliance. Its sealed lid and removable parts should make maintenance easier, while the lower flow rate makes it better suited to smaller-volume commercial use.
High-Flow Stainless Option – 25lb 13 GPM Under-Sink Stainless Interceptor
If you want a restaurant grease trap under sink with a simple stainless steel build and strong flow capacity, this 25 lb interceptor is worth a look. It is designed to keep fats, oils, and solids out of the drain system, while the removable basket makes routine cleaning more manageable for restaurants and other commercial settings.
Best For: Commercial spaces that want a stainless steel grease trap with a 13 GPM flow rate and easy-to-remove basket.
Pros:
- Thickened 201 stainless steel construction
- 13 GPM flow rate for continuous wastewater handling
- Removable basket simplifies cleaning
- Compact enough for restaurants, schools, and factories
Cons:
- Cleaning is still recommended every 2-3 months
- No certification or accessory bundle is mentioned
This model is a straightforward choice if you prioritize a stainless steel body and solid throughput over extra features. The dimensions and flow rate make it versatile, but its performance still depends on consistent maintenance to keep grease buildup under control.
Compact Filtration Pick – DYNAMI 8-10lb Stainless Steel Grease Trap
For tighter spaces, this restaurant grease trap under sink is built around a compact stainless steel form factor and a four-stage filtration system. The DYNAMI unit is designed for separating oil and water efficiently, with a smooth surface that should be easier to clean and a sealed structure intended to reduce leakage.
Best For: Smaller restaurant kitchens that need a compact grease interceptor with multi-stage filtration.
Pros:
- Compact 13.8 x 9.8 x 9 inch size
- Four-stage filtration system for efficient separation
- Stainless steel construction with smooth, easy-clean surface
- Reliable seals help reduce oil leakage
Cons:
- 8-10 lb capacity is smaller than some commercial units
- Automatic shut-off feature is described for open-air use
This is a space-saving option for buyers who care more about compact size and filtration stages than maximum capacity. The stainless steel build and seal-focused design are appealing, but the smaller footprint means it is better matched to lighter-duty commercial setups.
Compact Three-Stage PE Separator – Commercial Grease Trap, PE Plastic Side Inlet
If you need a restaurant grease trap under sink that is easy to fit and maintain, this PE plastic model offers a practical compact setup. Its 3-stage separation system uses a removable basket, baffle structure, and smooth outlet flow to help separate solids, grease, and water in busy kitchens.
Best For: Restaurants, cafeterias, bakeries, prep areas, and home kitchens that want a lightweight under-sink separator with straightforward maintenance.
Pros:
- 3-stage internal system separates solids, grease, and water.
- Removable mesh basket makes it easier to clear trapped food particles.
- Thickened PE construction is reinforced to support up to 220 lbs.
- Compact 14.9″ × 12.6″ × 12.6″ size is designed for under-sink installation.
Cons:
- PE construction may not feel as heavy-duty as steel options.
- Best suited to smaller commercial setups rather than high-capacity use.
Overall, this is a good fit if you want a lighter, easy-to-install grease trap for under-sink use without sacrificing basic separation performance. The sealed lid and lift-out basket should help simplify routine cleaning in food service environments.
Heavy-Duty Carbon Steel Interceptor – Wentworth 8 Pound Commercial Grease Traps
For a restaurant grease trap under sink application where durability matters, this Wentworth unit is built from 11-gauge carbon steel and comes PDI certified. It uses a 4 GPM design with threaded inlet and outlet ports, making it a strong pick for commercial plumbing setups that need a sealed, regulation-friendly interceptor.
Best For: Commercial kitchens, food processing spaces, and canteen setups that want a heavy-duty steel grease trap with certification and higher-flow handling.
Pros:
- PDI certified for compliance-minded installations.
- 11-gauge carbon steel construction is designed for long-term durability.
- Threaded 2-inch inlet and outlet ports help create a tight connection.
- 8 lb capacity and up to 4 GPM flow rate suit commercial wastewater use.
Cons:
- Weighs 42 pounds, so it is less convenient to move than lighter models.
- Freestanding installation may require more space and planning.
This is the kind of grease trap to consider if your priority is rugged construction and a proven metal build. It is a solid fit for buyers who want a more traditional commercial interceptor with strong sealing and a wide size range from the same brand.
Space-Saving Four-Stage Steel Separator – Commercial Grease Trap, 4-Stage Stainless Steel Under Sink Interceptor
This restaurant grease trap under sink is aimed at kitchens that need compact filtration with a stainless steel build. Its four-stage chamber design, removable perforated baskets, and sealed construction are designed to separate solids, grease, and water while keeping odors and leaks under control.
Best For: Small to medium kitchens, bars, bakeries, food trucks, and restaurant prep areas that need a compact stainless steel under-sink interceptor.
Pros:
- Four-stage filtration provides multi-compartment separation.
- Stainless steel body resists corrosion, cracking, warping, and aging.
- Removable baskets and lift-up top simplify cleaning.
- Compact 14″ × 10″ × 9.1″ size is made for limited-space installs.
Cons:
- 8-10 lb capacity is smaller than larger commercial interceptors.
- May be better suited to limited-space operations than high-volume kitchens.
For buyers who want a smaller but more premium-feeling metal option, this model is a strong fit. The sealed gaskets and polished interior should appeal to kitchens that want easier cleanup and dependable under-sink performance.
Stainless Steel Pick – Wadoy 8 lb Commercial Grease Trap
If you need a restaurant grease trap under sink that prioritizes sealing and straightforward installation, this Wadoy unit is built for that job. It uses a fully assembled stainless steel body, a removable basket, and a 5 GPM flow rate to help separate fats, oils, and solids before they reach the drain.
Best For: Home and restaurant kitchens that want a compact under-sink interceptor with multiple leak-prevention features.
Pros:
- Thickened 201 stainless steel construction resists rust and corrosion.
- Threaded outlet, rubber seals, and buckle locks are designed to reduce leakage.
- Fully assembled design simplifies connecting sink and dishwasher lines.
- Removable basket helps with routine cleaning and maintenance.
Cons:
- 5 GPM flow is lower than some larger-capacity options.
- Requires periodic cleaning every 2 to 3 months to stay effective.
This is a practical choice if durability and a compact footprint matter more than maximum throughput. The 8 lb, 14 x 10 x 9.8 inch format should fit many tighter kitchen spaces while still handling everyday grease separation.
High-Flow Upgrade – BEAMNOVA Commercial Grease Trap
This restaurant grease trap under sink is aimed at users who want a bigger flow margin and a straightforward installation path. The BEAMNOVA model comes fully assembled, uses heavy-duty 201 stainless steel, and is rated for up to 13 GPM, making it a strong fit for busy sink and dishwasher drainage.
Best For: Restaurant, food truck, or home kitchen setups that want higher flow and a side outlet option.
Pros:
- Upgraded design includes smoother welding, rounded corners, and improved threading.
- 13 GPM flow rate supports efficient wastewater handling.
- Fully assembled body makes installation simpler.
- Side drainage outlet adds flexibility for floor drain connection.
Cons:
- Users should verify local regulations before buying.
- Must be installed on a flat floor for proper operation.
The mix of higher flow, sealing rings, and a side outlet makes this a flexible commercial option. If you need an under-sink interceptor that can keep up with more demanding drain use, this model stands out for practicality rather than complexity.
Multi-Stage Filter Choice – Gerrii 7.6 Gallon Commercial Grease Trap
If you want a restaurant grease trap under sink with a more filtration-focused design, the Gerrii model is built around a 7-stage separation system. It uses HDPE construction, a removable basket, and a 7 GPM flow rate to help keep grease, oil, and food waste out of the drainage system.
Best For: Cafes, bakeries, food trucks, and compact commercial kitchens that want multi-stage filtration and easy cleanup.
Pros:
- 7-stage filtration is designed to separate oil, grease, and solids effectively.
- Heavy-duty HDPE material offers corrosion resistance and durability.
- Removable basket helps capture food debris for easier cleaning.
- Space-saving under-sink dimensions suit compact kitchen layouts.
Cons:
- HDPE construction is different from stainless steel alternatives.
- 7 GPM flow may be less appealing for very high-volume sinks.
Overall, this is a good fit if your priority is filtration and maintenance convenience over metal construction. The larger 7.6-gallon size and compact under-sink design make it a sensible option for smaller commercial setups that still need reliable grease separation.
How We Picked the Best Restaurant Grease Trap Under Sink
We focused on practical specs that matter in a real Restaurant Grease Trap Under Sink setup: flow rate, grease-holding capacity, construction quality, inlet and outlet configuration, basket design, and how easy the unit is to clean. We also considered whether a model is better suited to compact prep areas or higher-volume kitchens.
Quick Comparison
Use capacity and flow together. A higher-capacity unit can reduce cleaning frequency, while the flow rating should match your sink usage and drainage demand. Stainless steel models tend to be the most durable choice for demanding kitchens, while plastic units can be lighter and easier to move or install in tighter spaces.
Key Buying Factors for Restaurant Grease Trap Under Sink
Capacity and Flow Rate
Capacity is measured in pounds, gallons, or liters depending on the model, while flow rate is usually listed in GPM. For a busy prep sink or dish area, choose a unit that can handle peak water use without slowing drainage. Undersizing a grease trap often leads to overflow, odor, and more frequent service.
Material and Durability
Stainless steel is generally the best fit for commercial kitchens because it resists corrosion and stands up well to repeated cleaning. Plastic models can still be useful for lighter-duty applications, especially where weight and budget matter more than long-term ruggedness.
Installation Layout
Check whether the unit uses side inlet, threaded outlet, or fully assembled connections, and confirm your under-sink clearance before buying. In a Restaurant Grease Trap Under Sink installation, access for cleaning is just as important as fit, so leave enough room to remove baskets and service the lid.
Filtration and Maintenance
Multi-stage separation and removable baskets make routine maintenance easier by capturing solids before they reach the main chamber. Look for a design that lets staff empty and rinse components quickly, since neglected traps can create odors and reduce system performance.
Who Should Buy Which Restaurant Grease Trap Under Sink?
If you run a high-volume kitchen, prioritize larger stainless steel models with stronger flow ratings and easier service access. Smaller cafes, canteens, or secondary prep areas may do well with compact, lower-capacity units that are simpler to fit under tight counters. If you want the easiest day-to-day upkeep, choose a model with a removable basket, clear access points, and straightforward plumbing connections.
For most buyers, the best choice is the one that matches your actual sink load, maintenance routine, and available cabinet space—not just the biggest spec sheet.