Choosing a grease interceptor for your warewashing sanitation grease setup is a capacity-versus-convenience trade-off. Some kitchens need a compact trap that catches grease in a filter, while others need a bulk liquid separator that keeps up with high flow. Here, the 20 LB Grease Trap and the 50L Oil-Water Separator represent those two approaches. The decision comes down to how much grease your sink sends through the pipes, how much space you have under the counter, and how much you want to spend.
Quick verdict
The 20 LB Grease Trap costs USD 130.90, and the 50L Oil-Water Separator costs USD 70.15, a USD 60.75 gap. The 20 LB uses a filter-based design; the 50L is a plastic separator.
Comparison table
| Product | Price | Listed Capacity | Flow Rate | Material |
|---|---|---|---|---|
| 20 LB Grease Trap Grease Interceptor Trap 4 Layer filter Interceptor Trap US | USD 130.90 | 20 lbs | 0.51m³/h / 2.2GPM | 201 Stainless Steel, Alloy, Brass, Plastic with Steel Wire |
| 50L Grease Trap Interceptor Oil-water Separator Restaurant Kitchen Under Sink | USD 70.15 | 50L / 13.21gal | 2.1T / 4629.71lbs/h | PP, Rubber |
Note that the capacity units differ: the 20 LB is a grease-holding rating in pounds, while the 50L is a liquid-volume rating in liters. They are not directly comparable, so focus on what your sink sends through: grease solids or liquid flow.
Where each product wins
Both units have their place; the right one depends on the kind of waste your sink produces. The 20 LB Grease Trap wins for its filter basket and oil drain valve, which make grease removal more direct. It also has a 4-layer filter design and an 80cm/31.5in hose. The 50L Oil-Water Separator wins for its freestanding, under-countertop design and the included assembly kit. It also has a top inlet and left outlet layout.
Product notes
20 LB Grease Trap Grease Interceptor Trap 4 Layer filter Interceptor Trap US
This interceptor is built as a complete under-sink kit. The construction mixes 201 stainless steel, alloy, brass, and plastic with steel wire, finished with welding, polishing, and electrostatic spraying in black. The product size is 48*43*36cm, and the package measures 71*40*48cm, so it needs a generous amount of cabinet space. The hose runs 80cm/31.5in, giving you some placement flexibility. One detail to plan for: the water inlet and outlet are both 4.8cm/1.9in in diameter, so your plumbing connections need to match that size. The metal and alloy build is the main reason to choose it over a plastic unit for a permanent installation.
50L Grease Trap Interceptor Oil-water Separator Restaurant Kitchen Under Sink
The 50L separator is a freestanding or under-countertop unit made of PP plastic and rubber. It has a rectangular grey body with a top inlet and a left outlet, and it requires assembly. The package includes the separator, a drainage pipe, a pair of gloves, and a sealing ring. The product size is 45*35*30cm with a thickness of 3-4mm, and the drainage pipe is 78cm/30.71in. The outlet diameter is 3cm/1.18in, which is narrower than the inlet, so careful alignment is needed to prevent leaks. The plastic body keeps the unit light, but it is not a metal interceptor, so it may be better for a freestanding setup than for a direct weld-in installation. If you want a lightweight separator that you assemble yourself, this unit offers a straightforward design for under-sink or freestanding placement.
Final choice by use case
Choose the 20 LB Grease Trap when your priority is a filter-based metal unit with a drain valve for direct grease removal. Choose the 50L Oil-Water Separator when you want a freestanding plastic unit with a higher listed flow rate and are comfortable with assembly.
