Grease traps only work when they actually fit under your sink and handle the volume your kitchen produces. The two units here take opposite approaches: a plastic interceptor from Beseder and a stainless steel under-sink model. For anyone dealing with warewashing sanitation grease, the decision usually comes down to material, condition, and the workload you expect.
No single option is universally better, but the trade-offs are clear.
Quick verdict: If you want the larger holding space and a plastic body that won't rust, the Beseder is the choice. If you prefer a new stainless steel unit, the stainless under-sink trap is the practical pick.
Both traps separate oil from water and fit under a sink, but they differ in the storage volume and the material next to your drain. The table below shows the key differences side by side.
| Product | Price | Capacity | Material | Condition | What stands out |
|---|---|---|---|---|---|
| Beseder 70-lb Interceptor | $99.00 | 70 lb | Plastic | New - Open box | Thick 1/4" walls, 2" thread side connection |
| Stainless 18-20L Interceptor | $49.03 | 18-20L | Stainless Steel | New | Compact dimensions, includes drainage pipe and lid |
The Beseder's thicker plastic walls are the main durability story, while the stainless unit's included accessories make it a more complete package from the start. The right pick will also depend on how often you want to clean the unit, so keep that in mind as you read the notes.
Where each product wins
The Beseder wins when you want a thick-walled unit with a concrete plumbing detail: the 2" thread side connection. It's the stronger choice for a kitchen that expects heavy use and doesn't want metal corrosion as a concern. The thicker walls add peace of mind during a busy shift.
The stainless model wins for shoppers who want a new unit with the package contents sorted out. At $49.03, it sits $49.97 below the Beseder's $99.00 price, so the price difference alone may decide it. Its smaller footprint also helps when the cabinet space is tight.
The two product notes below dig into what each unit offers and where each one falls short.
Beseder Commercial Grease Interceptor Trap 70 lb
The Beseder brings a 70-lb capacity and a 1/4-inch-wall plastic body, so it's built to stand up to heavy use without rusting. The dimensions listed (15.75 x 13.2 x 10.63 inches) tell you it's meant to fit under a standard sink. The plastic construction also means you don't have to worry about corrosion the way you might with metal. That makes it a stronger fit for steady frying output. The downside is the condition: new open box with final-sale terms, so you're accepting the unit as-is. If you want a larger-capacity plastic interceptor with a specific 2-inch thread side connection, this model is the one to consider.
Stainless Under-Sink Grease Trap 18-20L
The stainless steel unit comes as a new product rated at 18-20L. Its compact dimensions (13.8 x 9.8 x 9 inches) make it a good fit for tight spaces, and the package includes the drainage pipe and lid. The stainless steel construction points to durability and a longer service life, which matters in a kitchen that sees constant washing. The limitation is that the 18-20L capacity is smaller than the Beseder's, so you'll likely empty or clean it more often in busy kitchens. If you prefer a new stainless option with the necessary accessories in the box, this is the practical choice.
Final choice by use case
Choose the Beseder when your priority is holding room and a rust-proof build. Choose the stainless model when a new build with the needed fittings matters most for your day-to-day cleanup. There's no universal winner here; the right under-sink grease trap depends on your kitchen's volume and how much condition risk you can accept.
