For warewashing and grease control, the real decision isn't which brand to trust; it's which stainless steel interceptor will separate oil from water without turning into a plumbing problem later. The four options on this page share the same stainless steel build and the same 18-20L working capacity, and their listed prices sit within four cents of one another. With that much overlap, the choice comes down to the small extras: rain protection, package contents, and the drain connection thread.
Quick take
If your kitchen sink produces moderate grease loads, any of the four interceptors covers the core task. The wastewater inlet diameter is the same across the group, so the piping connection point is consistent. The differentiator worth your attention is what each version adds to that base stainless design.
Listed price comparison
| Option | Listed price | Comparative bar |
|---|---|---|
| Stainless interceptor with open-air protection | USD 49.03 | |
| Stainless interceptor with open-air protection | USD 49.03 | |
| Stainless interceptor with package contents | USD 49.07 | |
| Stainless interceptor with thread detail | USD 49.03 |
The price bars show that cost is not where these units diverge. The material is consistent across all four, so the right pick depends on the extra detail that matches your installation.
Decision matrix
| Pick this option if... | Choose | Why it works |
|---|---|---|
| You need rain protection in an open-air spot | The USD 49.03 version with open-air protection | It is built for open-air placement |
| You want the included components listed | The USD 49.07 version | It lists the grease trap, drainage pipe, and lid |
| You care about the drain connection threads | The USD 49.03 version with thread detail | It calls out an even, smooth thread line |
| You want a straight stainless separator without extra features | Any of the USD 49.03 versions | They share the same listed size and construction |
Product notes
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US - USD 49.03 with shut-off
This is the version to reach for when the grease trap will sit outside a covered sink cabinet. Its product details describe an automatic shut-off device that activates in open-air situations, so a sudden rain shower won't keep the unit collecting water. It also adds four stages of filtration, which is a useful fit for kitchens that handle mixed mineral, animal, vegetable, or emulsified oils. The shared stainless construction means you are not trading durability for weather protection. The trade-off is that the rain shut-off is valuable mainly when the trap is exposed to the weather; if the unit is tucked under a sink, that extra feature is simply not doing much work for you.
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US - USD 49.03 with same feature set
This USD 49.03 version pairs the same stainless build with the same listed specification set as the shut-off version, so it is a direct match if you like that approach. The limitation is that the listed details do not add a new edge beyond the shut-off version; no separate feature is called out that would change the performance. Choose this one when the identical specification set is exactly what you need and you want a straightforward stainless interceptor without an extra decision point.
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US - USD 49.07 with package contents
This version is the one to pick when you want to see the full component list in the product details. The listed package includes one grease trap interceptor, one drainage pipe, and one lid, so there is no guesswork about what is supposed to arrive. The construction is still stainless steel. The trade-off is that the package contents are exactly those three items, which makes this a straightforward pick if you want a defined component list.
Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US - USD 49.03 with thread detail
The fourth version puts the focus on the thread line on the head of the water-oil separator, describing it as even and smooth. That is a helpful detail if you are connecting the unit to an existing drain and want the connection to seat cleanly. The stainless body stays consistent with the group. The trade-off is that the thread quality is the main differentiator here. If that connection detail is not a priority, this unit does not separate itself from the others in any other listed way, which makes it the right pick when a clean thread matters more than headline extras.
Final recommendation by use case
For an open-air grease trap, pick the USD 49.03 version designed for open-air placement. If you want the package contents spelled out, go with the USD 49.07 version that lists the grease trap, drainage pipe, and lid. If the drain connection thread is your main concern, choose the USD 49.03 version with the thread detail. And if you simply want a stainless 18-20L interceptor at the lowest of the listed prices, any of the USD 49.03 units will give you the same core capacity and material for four cents less than the USD 49.07 option.
