Grease can turn into a solid drain-blocking mass once it cools, so choosing the right interceptor is a genuine plumbing decision. Two stainless steel options sit close on price-the QX 8LB 5GPM Grease Interceptor at $51.97 and the Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap US at $49.03-but they're specified differently. One is built around a flow-and-load rating; the other around a larger capacity and a multi-stage filtration story. Here's how to decide.
Quick Verdict
If you prefer to choose an interceptor by flow rating and want the maintenance convenience of service ports, the QX 8LB 5GPM is the more service-oriented pick. If you'd rather have a larger internal capacity and multi-stage filtration while spending less, the under-sink model is the lower-priced option.
At a Glance
| Attribute | QX 8LB 5GPM | Under Sink Grease Trap US |
|---|---|---|
| Price | $51.97 | $49.03 |
| Material | Stainless steel | Stainless steel |
| Type / Capacity | 8LB 5GPM | 18-20L capacity |
| Automatic shut-off | Listed | Listed |
Where Each Wins
QX 8LB 5GPM wins if you want to plan around a flow-and-load spec and like having service ports for oil removal and sampling. The under-sink model wins if you want a bigger tank and more filtration passes for a lower price.
Product Notes
QX 8LB 5GPM Grease Interceptor
The QX model is the higher-priced unit, but it comes with a flow-oriented specification that some kitchens will find easier to plan around. Its flow-oriented type is listed right in the title, so you can match it to a sink's expected grease load and water flow. The stainless steel body is compact at 13.8×7.9×7.9 inches, and the 48mm water inlet/outlet diameter is a solid standard size. Beyond the basics, the description highlights an oil drain device and a sampling port-useful when you want to examine the separated oil or drain it without a messy manual lift. The limitation is that it is the pricier of the two, and the specification centers on flow rather than on a volume-based size. For a flow-driven decision, that is a fair trade-off.
Stainless Under Sink Grease Trap US
The under-sink model takes a capacity-first approach with an 18-20L tank, which is generous for a stainless steel interceptor in this price area. It also advertises four stages of filtration, so the separation process gets more passes before the water moves toward the drain. The dimensions come to 13.8×9.8×9 inches, and the water inlet diameter is 4.8 cm, matching the QX unit's 48mm inlet. The listing emphasizes capacity and filtration rather than service ports. For a straightforward grease-trapping job where volume and lower cost matter more than service ports, this is the easier choice.
Final Choice by Use Case
Choose the QX 8LB 5GPM when your layout is built around a flow-rate spec and when an oil drain device or sampling port would make your maintenance routine easier. Choose the Stainless Under Sink Grease Trap US when you want a larger tank, a lower price, and a multi-stage filtration design.
