• PDI Certified
  • 20 GPM flow rate and 40 lb. grease capacity
  • 3" inlet & outlet
Usually Ships in 1 Business Day
When will I receive my Item?
2 reviews
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Length 24 Inches
Width 15 3/4 Inches
Height 15 Inches
Capacity 40 lb.
Flow Rate 20 GPM
Inlet and Outlet Size 3 Inches
Threaded Connections No


The Watts WD-20 Grease Interceptor 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 the Watts WD-20 are often used with cooking or prep sinks, pot sinks, and commercial dishwashers in various types of commercial food service operations. 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, lighter than water substances accumulate inside the trap above the static water line.

The Watts WD-20 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 Watts WD-20 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.
Inlet & Outlet Size: 3"

  • PDI Certified

    PDI Certified

    This item has been certified by the Plumbing and Drainage Institute (PDI), which promotes the advancement of Engineered Plumbing Products.

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Customer Reviews

  • Overall User Rating:

    Watts WD-20 Grease Interceptor 40 lb. Grease Trap

    5.0 stars from 2 reviews


    People Talk About:

    dept easy Grease Health required trap room plumber nicely much

    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.

    from Louise's Sweets Posted on

    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.

    Posted on

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