When a busy kitchen sink drains, grease can settle in pipes and turn into a stubborn problem. The first decision is where that oil goes. An under-sink interceptor has to separate oil from wastewater without clogging or taking over the cabinet. The Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US offers one compact approach.
Quick Verdict
This under-sink interceptor separates oil and water for low- to mid-volume kitchen setups. At USD 49.03, it is a straightforward choice if your drain line can work with the connection sizes.
Who It Suits
If your kitchen handles mineral oil, animal oil, vegetable oil, mixed oil, or various emulsified oil-water mixes, this interceptor is aimed at that job. The compact 35x25x23cm footprint is designed to fit under a sink, but you should measure the cabinet before purchase. It suits operators who want a simple oil-water separation unit rather than a high-volume grease management system.
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US

The key specification is the 18-20L stainless steel tank with a wastewater inlet and water outlet both at 4.8cm and a grease outlet at 2.2cm. Stainless steel construction is meant to extend service life, and the included lid, drainage pipe, and all accessories required for installation make it a complete starting package. The separate grease outlet gives you a distinct point for oil removal.
What Stands Out
The stainless steel body is a strong point because the material is meant to be more durable and extend service life. The capacity supports consistent daily use, and having a dedicated grease outlet simplifies routine removal.
Meaningful Trade-Offs
At 18-20L, this is not a high-volume interceptor. Kitchens with multiple fryers or heavy fryer oil output may need to empty it more often than they would like. The 4.8cm inlet and outlet are fixed sizes, so you need to confirm they match your existing plumbing. The compact footprint helps with space, but the trade-off is that capacity is limited by the same compact size.
Bottom Line
For a compact under-sink grease trap at USD 49.03, this unit is a practical fit for low- to mid-volume kitchen operations that handle oil-water mixtures. Match the connection sizes to your drain line, and it can handle the separation job without taking over the cabinet.