In a busy prep kitchen, the moment hot grease hits the sink, you're making a bet that your drain line can handle it. For warewashing sanitation grease, an under-sink grease interceptor is the first line of defense, and the decision comes down to capacity, connection size, and whether the unit fits the space under your sink.
Quick Verdict
The Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US is a compact stainless steel trap listed at USD 49.02. With an 18-20L capacity and 4.8cm inlet and outlet connections, it addresses the core need for a smaller under-sink setup. It suits kitchens that produce moderate grease and oil-bakery prep, sandwich stations, or light cooking-rather than heavy fryer volume.
Who It Suits
This trap fits a sink where you don't have room for a large floor-mounted interceptor. The listed dimensions are 35 x 25 x 23 cm, which is compact enough for an under-sink placement. The package includes one drainage pipe and one lid, so you have the basic parts to get the trap into the drain line.
What Stands Out from the Listed Details
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US

The stainless steel body is the primary material used here, giving you a corrosion-resistant surface for constant contact with hot water and grease. The separate 2.2cm grease outlet is another useful detail-it lets the lighter grease separate and exit on its own, while the 4.8cm wastewater inlet and outlet keep the main flow moving.
At 18-20L total capacity, the trap is not trying to be a high-volume interceptor. It's sized for a single prep sink or a small dishwashing line. The included drainage pipe and lid round out the kit, so you know what you're getting before you start.
Meaningful Trade-Offs
The capacity and connection size are the real trade-off. A 4.8cm inlet and outlet is on the smaller side for a commercial drain line. If your sink receives multiple fixtures or a high-output fryer, the flow could overwhelm the trap and push grease downstream before it has time to separate. This is not a criticism of the trap itself-it's a sizing question. The 18-20L range is honest about its place in the lineup.
Another trade-off: the dimensions are specific, and the grease outlet is smaller at 2.2cm. You'll want to measure the cabinet space and check how the included drainage pipe aligns with your existing plumbing. Nothing about the listed details suggests it installs itself; it's a component you fit into the drain line.
Bottom Line
If you need a straightforward stainless steel under-sink grease trap for a moderate-flow sink, the Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US at USD 49.02 is a practical choice. Match it to your actual grease load and available space. For heavy fryer volume, you'd be better off looking at a larger interceptor; for a typical prep sink, this one hits the sweet spot.