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Watts WD-20 Grease Interceptor 40 lb. Grease Trap
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$452.49/Each
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Product Overview
- Prevents grease from entering plumbing and septic systems
- 11-gauge cold rolled steel body
- 20 GPM flow rate and 40 lb. grease capacity
- 3" inlet & outlet
Works With"Works With" items are guaranteed to work with the item you are viewing, such as lids that will fit a cup or casters that will fit a piece of equipment. If an item is not listed in this section, we do not guarantee that it will work with the product you are viewing and do not recommend that you purchase them for use together.
Protect your plumbing with this Watts WD-20 40 lb. grease trap.

The Watts WD-20 40 lb. grease trap 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 this one are often used with cooking or prep sinks, pot sinks, and commercial dishwashers in various types of commercial food service operations. Additionally your local health code may require one for your application.
PDI Certified
This item has been certified by the Plumbing and Drainage Institute (PDI), which promotes the advancement of Engineered Plumbing Products.
"40 lb Grease trap is required from my local health dept. It is nicely priced, built well and should last for years with an easy off cover for cleaning."
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Intercepts and Separates Grease
A flow restrictor on the inlet side of the interceptor slows incoming effluent and redirects it through baffling inside the grease trap. As the flow is gradually slowed, substances lighter than the water accumulate inside the trap above the static water line. It is PDI (Plumbing & Drainage Institute) Certified and maintains 90% separation efficiency, up to its rated grease retention capacity.

40 lb. Capacity, 20 GPM
This grease trap can hold up to 40 lb. of grease at a time, and can accept a flow rate of up to 20 GPM.

3" Inlet and Outlet
A 3" inlet and outlet size makes it easy to connect this grease trap to your facility's plumbing lines.

Durable Construction
This grease trap features a body made from 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).
Questions & Answers
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Compare to Other Products
Price
Length
Width
Height
Capacity
Features
Flow Rate
Inlet / Outlet Size
Material
- Item #: 320wd20Watts WD-20 Grease Interceptor 40 lb. Grease Trap
Price:$452.49/Each
- Length: 24 Inches
- Width: 15 3/4 Inches
- Height: 15 Inches
- Capacity: 40 lb.
- -specification unavailable
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 3 Inches
- Material: Steel
- Item #: 1414820Ashland PolyTrap 4820 40 lb. Grease Trap with Threaded Connections
Price:$356.49/Each
- Length: 29 Inches
- Width: 19 1/2 Inches
- Height: 14 3/4 Inches
- Capacity: 40 lb.
- Features: Made in America
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 2 Inches
- Material: Plastic
- Item #: 320wd20thdWatts WD-20-THD 40 lb. Grease Trap with Threaded Connections
Price:$412.49/Each
- Length: 24 Inches
- Width: 15 3/4 Inches
- Height: 15 Inches
- Capacity: 40 lb.
- Features: Threaded Connections
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 3 Inches
- Material: Steel
- Item #: 320wd20lthdWatts WD-20-L-THD 40 lb. Low-Profile Grease Trap with Threaded Connections
Price:$689.00/Each
- Length: 34 7/8 Inches
- Width: 22 7/8 Inches
- Height: 11 3/4 Inches
- Capacity: 40 lb.
- Features: Low Profile
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 3 Inches
- Material: Steel
- Item #: 320wd20lWatts WD-20-L 40 lb. Low Profile Grease Trap
Price:$749.00/Each
- Length: 34 7/8 Inches
- Width: 22 7/8 Inches
- Height: 11 3/4 Inches
- Capacity: 40 lb.
- Features: Low Profile
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 3 Inches
- Material: Steel
- Item #: 320wd20aWatts WD-20-A 40 lb. Grease Trap with Partially Automatic Draw-Off
Price:$2,299.00/Each
- Length: 24 Inches
- Width: 15 3/4 Inches
- Height: 15 Inches
- Capacity: 40 lb.
- Features: Partially Automatic Draw-Off
- Flow Rate: 20 GPM
- Inlet / Outlet Size: 3 Inches
- Material: Steel
- Length:
- 24 Inches
- Width:
- 15 3/4 Inches
- Height:
- 15 Inches
- Capacity:
- 40 lb.

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Watts WD-20 Specs
- Quantity
- 1/Each
- Shipping Weight
- 91.12 lb.
- Length
- 24 Inches
- Width
- 15 3/4 Inches
- Height
- 15 Inches
- Capacity
- 40 lb.
- Flow Rate
- 20 GPM
- Inlet / Outlet Size
- 3 Inches
- Material
- Steel
- Type
- Grease Traps
Customer Reviews
4.8
5 Customer Reviews
4 reviews rated this 5 out of 5 stars.
- 5
1 reviews rated this 4 out of 5 stars.
- 4
0 reviews rated this 3 out of 5 stars.
- 3
0 reviews rated this 2 out of 5 stars.
- 2
0 reviews rated this 1 out of 5 stars.
- 1
Customers Say
Customers appreciate the grease trap for its easy installation, suitable size for small kitchens, and compliance with health department requirements. It is praised for its durability and compact design, making it a recommended choice for establishments needing to meet specific regulations.
- easy
- grease
- trap
- dept
- health
- installed
- kitchen
- required
- small
- 40lb
This AI-generated summary was created from real customer reviews
Verified Purchase
When we purchased our most recent establishment there was no grease trap in place. This installed extremely easy and has a fairly large capacity at a great price.
Verified Purchase
This is the perfect size for the small kitchen in our Wine Bistro. Building inspector was very impressed. Would highly recommend for a small kitchen.
Verified Purchase
40 lb Grease trap is required from my local health dept. It is nicely priced, built well and should last for years with an easy off cover for cleaning.
Verified Purchase
The Dormont WD-20 40lb Grease Trap was what the Health Dept required. Easy for the plumber to install and no issues with it yet. Doesn't take up much room either.