Keeping grease out of wastewater is a problem that shows up in two places: the exhaust hood above the range and the drain under the sink. If you let cooking oils and food solids settle in pipes or ventilation, you are looking at costly blockages. The four grease traps below take different approaches-some are simple collector boxes, others are full separators for restaurant sinks. The key is matching the unit to the point of use.
Quick take
For roof ventilator maintenance, the Dayton 48C174 collector box is the only option here built specifically for that job. For under-sink needs, the plastic Grease Trap Interceptor offers a large separator with assembly accessories. The stainless steel Grease Trap Interceptor is a compact stainless body with four stages of filtration. The Express KitchQuip Commercial Steel Grease Trap Interceptor is the steel unit for commercial drain lines.
Listed-price comparison
| Product | Listed Price | Relative price |
|---|---|---|
| Dayton 48C174 Grease Trap Collector Box | USD 62.00 | |
| 50L Grease Trap Interceptor Oil-water Separator | USD 70.15 | |
| Grease Trap Interceptor Stainless Steel | USD 49.02 | |
| 8lb Commercial Steel Grease Trap Interceptor - 4 GPM, PDI Approved | USD 269.95 |
The price spread runs from $49.02 to $269.95, with the stainless interceptor at the low end and the steel unit at the high end.
Decision matrix
| Situation | Recommended option | Why it fits |
|---|---|---|
| Upblast roof ventilator grease collection | Dayton 48C174 | Purpose-built collector box for that ventilation setup |
| Under-sink separation in a restaurant or cafeteria | Under-sink Grease Trap Interceptor | Large plastic reservoir with drain pipe and sealing ring |
| Compact stainless interceptor for wastewater oil | Stainless Steel Grease Trap Interceptor | Multi-stage filtration and stainless construction |
| Higher-flow commercial drain line | Commercial Steel Grease Trap Interceptor | Steel construction with a rated flow |
Product notes
#### Dayton 48C174 Grease Trap Collector Box for Upblast Roof Ventilators
The Dayton collector box is the part to reach for when your grease issue is in the ventilation, not the sink. It is a Dayton component, model 48C174, for upblast roof ventilators. That makes it a direct fix for keeping grease from building up in the hood system, and it comes as a single new unit. The trade-off is that it is not an interceptor for sink wastewater; its role is specifically the exhaust side of a commercial kitchen. If your main concern is a rooftop exhaust that drips grease, this is the targeted choice. If you need to protect a floor drain, look at the interceptor options below.
#### 50L Grease Trap Interceptor Oil-water Separator Restaurant Kitchen Under Sink
This plastic separator is sized for real restaurant use, with a 50L capacity and a flow rate of 2.1 tonnes per hour. The package includes a drainage pipe, gloves, and a sealing ring, and the mounting options include freestanding or under-countertop placement. It is a complete kit for someone who wants to set up oil-water separation under a sink without buying extra parts. The plastic body is lighter than the steel units, which can make installation easier. For a busy kitchen that needs a ready-to-assemble under-sink separator, this unit gives you a large reservoir and the accessories in one package.
#### Grease Trap Interceptor Stainless Steel For Restaurant Kitchen Wastewater Oil Us
The stainless steel interceptor has the lowest listed price of the group while still offering a metal body. Its four stages of filtration and automatic shut-off device make it a flexible option for separating mineral, animal, vegetable, or mixed oils. The compact overall dimensions of 35 x 25 x 23 cm and the 4.8 cm wastewater inlet give it a small footprint for tight under-sink spaces. This unit is best suited to lower-volume prep sinks where the water flow is steady but not heavy, given the compact size and the focus on filtration stages. If you want a multi-stage stainless separator for a small space, this unit covers that need at the low end of the listed price range.
#### 8lb Commercial Steel Grease Trap Interceptor - 4 GPM, PDI Approved
The Express KitchQuip interceptor is the highest-priced option, but it is also the only one with a flow rating of 4 gallons per minute and an 8 lb capacity. It is built from steel and carries PDI approval, along with NSF certification. The 17-inch length and 11-inch width make it a compact metal unit for a commercial drain line. The clear trade-off is price: it sits at the top of the listed price range. If you need a steel interceptor that is rated for 4 GPM flow and can handle the grease load of a food-service drain, this is the unit that meets that spec. If budget is a concern, the stainless interceptor covers similar material needs without the flow rating.
Final recommendation
Choose the Dayton 48C174 when your grease problem lives in the roof ventilator, not the sink. Pick the plastic under-sink Grease Trap Interceptor when you want an under-sink separator with a large plastic reservoir and all the assembly accessories included. If you need a compact stainless body with multi-stage filtration and you can work within a lower flow profile, the stainless Grease Trap Interceptor is a solid match. For a commercial drain line that needs a rated flow, the steel interceptor from Express KitchQuip is the one that closes the gap between a simple separator and a true flow-rated interceptor. Match the unit to the pipe it will serve, and the grease stays out of the plumbing.
