If you are searching for a 40-gallon grease trap, check the unit’s rated grease capacity and flow rate before ordering: the products below are listed mainly by pounds of grease capacity and gallons per minute, not by a 40-gallon tank volume. The AmGood and Canplas models are closest to a 40-pound-capacity, 20-GPM specification; Zurn is a lower-capacity option, while the stainless-steel and IRONWALLS models serve different installation or flow needs.
| Product | Listed capacity or flow | Best suited for |
|---|---|---|
| AmGood Store interceptor | 40 lb; 20 GPM | Buyers seeking a PDI-certified model |
| Canplas 3920A02S | 20 GPM; 40 lb size | Buyers comparing a thermoplastic option |
| Zurn GT2700-20-2NH | 20 GPM; 30 lb | Buyers who need a smaller grease capacity |
| Commercial 4-stage stainless model | Four-stage filtration | Compact under-sink installations |
| IRONWALLS interceptor | 4 GPM; 8 lb | Lower-flow sinks and small kitchens |
AmGood Store 40-Pound Grease Trap
This AmGood Store interceptor is specified for 40 pounds of grease capacity and a 20-GPM flow rate. Its listing also identifies it as PDI certified and notes no-hub connections and an included T-vent.
Best for: Commercial kitchen buyers looking for a 40-pound, 20-GPM unit with the listed certification and connection details. It was selected because its stated capacity and flow make it one of the closest matches to searches for a “40 gallon grease trap.”
Keep in mind: The stated 40-pound capacity is not a 40-gallon tank-volume rating. Confirm the required connection arrangement and local plumbing requirements before purchase.
Canplas 3920A02S Thermoplastic Interceptor
The Canplas listing gives a flow rate of 20 GPM, a 40-pound size, and a 2-inch connection. Its feature information also states a 70-pound actual grease capacity. Because the listing presents both 40-pound and 70-pound figures, verify which capacity figure applies to the specific model and installation.
Best for: Buyers comparing a thermoplastic interceptor with a 20-GPM rating and a specified 2-inch connection. It was selected as a close flow-rate alternative to a 40-pound commercial unit.
Keep in mind: Do not treat the 40-pound size and 70-pound actual-capacity statement as interchangeable with a 40-gallon volume. Confirm the manufacturer’s documentation and plumbing fit before ordering.
Zurn GT2700-20-2NH Grease Trap
This Zurn model is listed at 20 GPM with a 30-pound grease capacity. It has fabricated steel construction with a Dura-Coated finish, which the listing describes as corrosion-resistant. A secured, slip-resistant cover with a center tie-down assembly is designed to help keep odors from escaping.
Best for: Buyers who need a 20-GPM unit but do not require the 40-pound capacity listed for some alternatives. Its construction and secured cover are useful points to compare for demanding environments.
Keep in mind: Its stated grease capacity is 30 pounds, not 40 pounds. Choose another option if the project specification explicitly requires at least 40 pounds of grease capacity.
Four-Stage Stainless Steel Interceptor
This stainless-steel commercial interceptor is described as having four filtration stages that separate solids, grease, and water. Its listed design is intended for compact under-sink kitchen installations.
Best for: Buyers prioritizing a multi-stage filtration design and under-sink format over a clearly stated 40-pound or 40-gallon capacity. It is included as an installation-style alternative, not as a confirmed capacity match.
Keep in mind: The supplied product information does not state its grease capacity, flow rate, or connection size. Verify those specifications before comparing it with a 20-GPM model.
IRONWALLS 8-Pound Compact Interceptor
The IRONWALLS model is listed as an 8-pound commercial grease trap with a 4-GPM flow rate. It has a side inlet, stainless-steel construction, and a removable mesh filter. The listed dimensions are 14.2 by 10.2 by 9.5 inches.
Best for: Small sinks, coffee shops, food trucks, or other applications where a compact unit and lower flow rate are appropriate. Its removable mesh filter and stated dimensions help buyers assess its under-sink fit.
Keep in mind: Its 4-GPM rating and 8-pound capacity are far below the 20-GPM, 40-pound options. Avoid it if the project requires a 40-pound capacity or higher flow.
Buying Guide: How To Choose A Grease Trap
Does “40 gallon” mean 40 pounds of grease capacity?
No. Gallons measure volume, while pounds describe weight or a listed grease-capacity rating. The products here do not provide a confirmed 40-gallon tank-volume specification. Match the unit to the capacity terminology in your plumbing plans, local code, or installer’s requirements instead of assuming the figures are equivalent.
How should you compare flow rates?
Use the required gallons-per-minute rating for the fixtures connected to the interceptor. The AmGood, Canplas, and Zurn listings specify 20 GPM; the IRONWALLS listing specifies 4 GPM. The four-stage model’s supplied information does not state a flow rate, so request that specification before comparing it.
What else should you confirm before purchase?
- Check the grease capacity, flow rate, connection size, and inlet arrangement against the installation plan.
- Measure the available under-sink space and confirm the product dimensions when provided.
- Ask the installer or local authority about applicable plumbing requirements and whether the listed configuration is suitable.
- For Canplas, clarify the listing’s 40-pound size and 70-pound actual-capacity statements with the manufacturer or seller.
Frequently Asked Questions
Is a 40-pound grease trap the same as a 40-gallon grease trap?
No. Pounds and gallons are different measurements. Confirm whether your project requires grease weight capacity, tank volume, or a specific flow rating.
Which listed product is closest to a 40-pound, 20-GPM specification?
The AmGood Store model explicitly lists 40 pounds and 20 GPM. Canplas lists a 20-GPM rate and a 40-pound size, but also states a 70-pound actual capacity that should be verified.
Which option has the lowest listed flow rate?
The IRONWALLS model is listed at 4 GPM, making it a lower-flow alternative rather than a match for the 20-GPM models.
Should I choose a grease trap based on capacity alone?
No. Compare flow rate, grease capacity, connections, physical fit, and local installation requirements together. A high-capacity unit may not suit an installation if its flow or connections do not match.