Overall User Rating from 1 review

  • Prevents grease from entering plumbing and septic systems
  • 11-gauge cold rolled steel body
  • 20 GPM flow rate and 40 lb. grease capacity
  • 3" threaded inlet & outlet

UPC Code:




Ships via Common Carrier
Usually Ships in 1 Business Day
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White Glove Delivery - Available -

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Standard common carrier delivery options cover the cost of getting an item to your shipping address but our White Glove delivery service does that and more!

The White Glove agent will call to schedule a delivery appointment within a four hour window, which gives you the flexibility to work around your busy schedule and to prepare the space where your item will be placed. Upon delivery, trained professionals will unload your item from the truck, bring it into the room of choice, unpack the item and remove all packaging debris from the premises.

Please note that White Glove delivery will typically add 5 - 7 business days to your order's transit, and only includes 30 minutes of on-site time. If on-site time beyond 30 minutes is required, you may be responsible for additional fees. Additionally, this service does not include set-up of the items being delivered.

You May Also Need

"You May Also Need" 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.

Length 34 7/8 Inches
Width 22 7/8 Inches
Height 11 3/4 Inches
Capacity 40 lb.
Flow Rate 20 GPM
Inlet and Outlet Size 3 Inches
Threaded Connections Yes

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The Watts WD-20-L-THD low profile 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. This low profile, or low rough-in design is 3 1/4" shorter than Watts's WD-20 Grease Interceptor for low clearance applications.

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

The Watts WD-20-L-THD low rough-in 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-L-THD low profile grease trap has a grease capacity of 40 lb., 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.

Overall Dimensions:
34 7/8"L x 22 7/8"W x 11 3/4"H
Flow Rate: 20 GPM (Gallons Per Minute)
Grease Capacity: 40 lb.
Threaded Inlet & Outlet Size: 3"

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  • 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-L-THD 40 lb. Low Profile Grease Trap with Threaded Connections

    5.0 stars from 1 review


    People Talk About:

    piece parts needed looks job happy finish exact easy contained

    This piece was an exact replacement of what I had in my restaurant. The swap was easy and the box contained all the parts I needed to finish the job. I am happy with the quality looks like all the welds are solid and should last me many years.

    from Sauce Posted on

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