Grease traps are the unsung workhorse of any commercial kitchen. When you're setting up a warewashing sanitation grease line, the two choices before you look almost identical: both are stainless steel interceptors, both separate oil from water, and both are meant to sit under a sink. The real decision is about how you measure your kitchen's needs. One unit leads with a flow rating: 8LB and 5 GPM. The other leads with a capacity: 18-20L. The difference in listed price is about $3.
Quick verdict
Choose the QX 8LB 5GPM Grease Interceptor if your plumbing is flow-rated and your under-sink space is tight. Choose the Stainless Under Sink Grease Trap US if you have cabinet room and want a bigger grease-holding volume at a slightly lower listed price.
At a glance
| Product | Listed price | Key listed specs | Best for |
|---|---|---|---|
| QX 8LB 5GPM Grease Interceptor | USD 51.97 | 8LB load, 5 GPM flow, 350×200×200 mm (13.8×7.9×7.9"), 48 mm inlet/outlet, silver stainless steel | Tight sink cabinets and flow-rated drainage |
| Stainless Under Sink Grease Trap | USD 49.03 | 18-20L capacity, 35×25×23 cm (13.8×9.8×9"), stainless steel, four-stage filtration | More sink space and bigger grease loads |
Where each product wins
The QX wins when your drain line is rated by gallons per minute and you want the narrower of the two stainless bodies. The Stainless Under Sink wins when total capacity is more important than flow rating, and when you want to keep the upfront cost on the lower end.
Product notes
QX 8LB 5GPM Grease Interceptor
Pour-heavy sinks with a defined flow rate are where this QX unit makes sense. The 8LB load and 5 GPM rating are printed right in the product name, so you can match it to a drain line that needs a 5-gallon-per-minute pace. The stainless steel body measures 13.8 × 7.9 × 7.9 inches, which makes it the more compact option of the two. It also lists a 48mm water inlet and outlet diameter, so the pipe size is clear. The catch is the price: at USD 51.97 it's about $3 more than the under-sink model. If you don't need that flow-rate sizing, the extra cost may not buy you anything useful for your warewashing sanitation grease setup.
Stainless Under Sink Grease Trap US
This is the unit to pick when capacity is your main number. The listing gives the tank a 18-20L capacity, which tells you how much greasy water it can hold as it separates. It measures 13.8 × 9.8 × 9.0 inches, so it's a bit taller and deeper than the QX-make sure the cabinet has that extra room. The stainless build, four-stage filtration, and easy installation highlights make it a convenient install for a standard under-sink spot. The trade-off is its footprint: at those dimensions, it needs a roomier cabinet than the QX. If you have the space, though, this unit gives you more capacity without a higher listed price.
Final choice by use case
For a tight, flow-rated drain line, the QX 8LB 5GPM is the one. For a larger under-sink cabinet with heavier grease accumulation, the Stainless Under Sink Grease Trap US gives you more capacity. Match the unit to your available space and the number that your plumber actually uses-GPM or liters-and you'll have the right warewashing sanitation grease interceptor for your kitchen.
