• PDI Certified
  • 20 GPM flow rate and 40 lb. grease capacity
  • 3" threaded inlet & outlet
Special Order

Some items on our website are not normally stocked in our warehouses. These items are marked "Special Order"
underneath the price on the item's page.

Please understand that Special Order items may not be able to ship within 1 business day like our regularly-stocked items.
Some may be shipped directly from the manufacturer. Others might have to be ordered into our warehouse with the next order
from that manufacturer and then shipped to you; this could take up to several weeks.

As a result, we urge you to contact us if you have questions about the delivery time of a Special Order item you wish to order.

Please note - we are not always able to cancel special order items once the order is placed. These items may also be non-returnable. Please contact us if you have any questions before ordering this item.

2 reviews
MFR Item:
Length 24 Inches
Width 15 3/4 Inches
Height 15 Inches
Capacity 40 Pounds
Flow Rate 20 Gallons Per Minute
Inlet and Outlet Size 3 Inches
Threaded Connections Yes


The Dormont WD-20-THD Grease Interceptor 40 lb. grease trap with threaded connections prevents greasy substances from entering plumbing systems, septic fields, and wastewater treatment facilities where they cannot be processed properly and could harm the environment.

Grease traps like the Dormont WD-20-THD are often used with cooking or prep sinks, pot sinks, and commercial dishwashers in various types of commercial food service operations.

The Dormont WD-20-THD Grease Interceptor features a body constructed of 11-gauge cold rolled steel with an oven-cured, acid-resistant baked gray epoxy coating. Other standard features include a solid steel cover with gasket, a removable baffle assembly, a deep seal trap with cleanout, no hub connections, and an external cast iron flow control fitting (flow restrictor).

The Dormont WD-20-THD grease trap has a grease capacity of 40 lbs., and a flow rate of 20 GPM. It is PDI (Plumbing & Drainage Institute) Certified, and meets the industry and PDI Standard PDI-G101 for separation efficiency. This standard specifies that the grease trap must maintain 90% separation efficiency up to its rated grease retention capacity.

Please consult the specification sheet for detailed diagrams, measurements, sizing guidelines, and installation requirements.

Extended lead times may apply for this item based on availability. Please contact us for the current lead time.

Overall Dimensions:
24"L x 15 3/4"W x 15"H
Flow Rate: 20 GPM (Gallons Per Minute)
Grease Capacity: 40 lbs.
Threaded Inlet & Outlet Size: 3"

Because this item is not stocked in our warehouse, processing and transit times will vary. If you need your items by a certain date, please note this in the comment section while checking out! Please feel free to log on to our Live Chat should you have any questions before placing your order. After your order is placed, we will update you via email to let you know how this will be shipping to you.


PDI Certified

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Customer Reviews

Overall User Rating: Dormont WD-20-THD Grease Interceptor 40 lb. Grease Trap with Threaded Connections ( 5.0 stars from 2 reviews )

    This larger grease trap does a fantastic job. I was amazed at how fair the shipping cost was, even though it weights over 80 pounds.

    from Gilpin Market Posted on

    Grease Trap - I didn't want it, but if you have a kitchen, you will probably need it. Plumbers installed with ease. Haven't had to change it yet.

    from Topplez Corporation Posted on

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