Choosing a commercial grease interceptor for a kitchen usually starts with one question: are you managing grease in the sink wastewater line or in the exhaust path above the roof? The four products in this guide cover both sides of that job. One is a roof-ventilator grease collector, while the other three are sink-line interceptors designed to separate oil, water, and solids. For warewashing and sanitation grease handling, the right choice depends on the water volume you expect and the space you have under or near the sink.
Quick take
If you need a roof-ventilator grease collector, the Dayton 48C174 is the only unit in this set built for that purpose. If you need a larger sink-line separator, the AOKNV unit lists the highest capacity and a 15.32 GPM flow rate. For a more compact setup, the PE plastic interceptor and the under-sink model take up less room and give you two different material options.
Listed price comparison
The listed prices for these four items span from USD 49.02 to USD 180.20. The table below uses price bars to show the relative spread.
| Product | Listed Price | Price Bar |
|---|---|---|
| Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap | USD 49.02 | |
| Dayton 48C174 Grease Trap Collector Box for Upblast Roof Ventilators | USD 62.00 | |
| Commercial Grease Trap, Lightweight PE Plastic Grease Interceptor Trap Side Inle | USD 142.49 | |
| 40lbs Grease Trap 15.32 GPM Water Oil-water Separator Commercial Interceptor | USD 180.20 |
Matching the option to the use case
| Use case | Option to consider | Why it lines up |
|---|---|---|
| Roof-ventilator exhaust grease | Dayton 48C174 | Listed as a grease trap collector box for upblast roof ventilators. |
| High-volume sink wastewater line | 40lbs AOKNV separator | Lists a 40 lb capacity and a 30-inch drainage pipeline. |
| Compact sink-line interceptor | PE plastic interceptor | Comes with an oil sump and a 13 x 13 x 6 inch footprint. |
| Stainless under-sink setup | Stainless under-sink grease trap | Lists stainless material and an 18-20L capacity. |
Product notes
Dayton 48C174 Grease Trap Collector Box
The Dayton 48C174 is a grease collector box made for upblast roof ventilator systems, not for a sink drain line. The listed model is a single new unit, so it is a replacement component rather than a full interceptor. Choose it if your kitchen exhaust uses an upblast ventilator and you need the grease collector that belongs in that airflow path. The limitation is scope: it is built for the roof-ventilator path, so it is not a sink-line interceptor. If your grease problem is in the wastewater line, this collector box will not solve it.
40lbs Grease Trap 15.32 GPM Water Oil-water Separator
The AOKNV 40lb unit is the largest listed option in this set, with a 40 lb capacity and a 15.32 GPM flow rate. Its dual-tank design separates grease, water, and solid food residue at the same time. The listed connection is threaded and the drainage pipeline is 30 inches, so it is a larger form factor. The limitation is the listed price of USD 180.20, the highest of the four products here. If you need a heavy-duty interceptor for a high-volume kitchen line and have room for a larger unit, this is the product to focus on.
Commercial Grease Trap, Lightweight PE Plastic Grease Interceptor
This PE plastic interceptor is a compact choice for a smaller kitchen or a kitchen sink line, with a 13 x 13 x 6 inch footprint and a 6.6-pound weight. The included component is an oil sump, and the material is plastic rather than stainless steel. Choose it if you want a lighter interceptor with the oil sump included. The trade-off is material and size: the PE build differs from the stainless model in this group, and the compact dimensions will not serve the same high-volume role as the AOKNV separator.
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap
This stainless steel interceptor is listed at USD 49.02, the lowest listed price in this comparison. The listed dimensions are 35 x 25 x 23 cm, with an 18-20L capacity and 4.8 cm inlet and outlet diameters. The package includes the interceptor, a drainage pipe, and a lid. Choose it if you need a stainless steel under-sink unit with a clear capacity number and the lowest listed price of these four products. The limitation is scale: at 18-20L it is a compact interceptor, so it will not handle the same volume as the 40lb AOKNV separator.
Final recommendation by use case
- For an upblast roof ventilator: Dayton 48C174.
- For a high-volume sink line: 40lbs AOKNV separator.
- For a lightweight compact interceptor: PE plastic grease interceptor.
- For an under-sink unit: Commercial Grease Interceptor Stainless Under Sink Grease Trap.
