Choosing a grease interceptor for warewashing sanitation grease duty comes down to one practical question: do you want the flow class stated or the capacity stated? The QX Commercial Grease Interceptor 8LB 5GPM and the Commercial Grease Interceptor Grease Trap Stainless Under Sink Grease Trap sit close in price, but they answer that question differently.
Quick verdict
Choose the QX trap if you want a stated flow class and an accessory package. Choose the Stainless Under-Sink Grease Trap if you want a declared capacity and a slightly lower listed price. At $49.03 and $51.97, the gap is only about $2.94, so the specification each one leads with-not the price-should make the call.
At a glance
| Option | Listed price | Flow or capacity | Best for |
|---|---|---|---|
| QX 8LB 5GPM Grease Interceptor | $51.97 | Stated flow class | Sinks that want a fixed flow class and included accessories |
| Stainless Under-Sink Grease Trap | $49.03 | 18-20L capacity | Sinks that want a stated capacity and the lower price |
Both traps share a 48mm/4.8cm inlet and outlet connection, and both are steel-bodied traps designed to separate oil and water. The difference is what each one leads with: flow class on the QX side, capacity on the under-sink side.
Where each product wins
- The QX side wins when you want a flow-class-specific interceptor. The model name includes the flow-class phrase, and the package includes the interceptor with accessories.
- The under-sink side wins when you want a declared capacity and the lower price. It is the model that gives you a liter-based capacity figure without costing as much.
Product notes
QX 8LB 5GPM Grease Interceptor
The QX model puts its flow-class identity right in the name. The compact body and included accessories make it a quick pick when you want a designated interceptor type. It also has an automatic shut-off device, an oil drain, a sampling port, and a corrugated board that can be cleaned annually. The trade-off is that its stated specification is a flow-class type, so the decision hinges on flow class. That clarity helps when your installation is planned around a rated flow class. If you would rather choose by a liter-based capacity figure, the under-sink model provides one.
Stainless Under-Sink Grease Trap
The under-sink trap leads with a directly stated 18-20L capacity. Along with that capacity, it includes a 2.2cm grease outlet and a package with one drainage pipe and one lid. It also has the lower listed price of the two, which is helpful when a stated holding volume matters more than a flow-class label. Its stated focus is capacity, while the QX model focuses on a flow-class designation. Both are steel-bodied traps meant to separate oil and water, so the final call comes down to which specification you would rather see in the product name.
Final choice by use case
Pick the QX Grease Interceptor when the flow-class designation and included accessories are what you need. Pick the Stainless Under-Sink Grease Trap when a stated capacity and the lower price mean more. Either way, the model that names the specification you care about is the one to install.
