Grease Interceptors & Restaurant Grease Traps

Grease Interceptors for Commercial Kitchens and Restaurants

Every commercial sink, dishwasher, and combi oven sends fats, oils, and grease downstream with every wash cycle. When that grease cools inside drain lines, it solidifies, causing blockages, foul odors, slow drains, and in many municipalities, regulatory fines for exceeding local FOG (fats, oils, and grease) discharge limits. A properly sized grease interceptor captures grease before it leaves your facility, protecting your plumbing and keeping your operation compliant with local codes. We offer commercial grease traps and interceptors from John Boos, Omcan USA, and Watts, ranging from compact 4 GPM under-sink units to large 500 GPM interceptors for high-volume institutional kitchens.

Standard Grease Traps

Standard hydromechanical grease traps use baffles to slow wastewater flow, allowing grease to separate and float to the surface while water passes through to the drain. These are the most common configuration for restaurant kitchens and are available in capacities from 8 pounds to 100 pounds with flow rates from 4 to 50 GPM. Carbon steel and epoxy-coated steel construction handles the hot water and caustic detergents typical in commercial dishwashing. Smaller units in the 8 to 30 pound range are suited to single prep sinks and mop basins, while larger units in the 50 to 100 pound range handle the combined flow from multiple fixtures in a busy kitchen.

Semi-Automatic Grease Interceptors

Semi-automatic grease interceptors add a mechanism that allows accumulated grease to be drawn off more easily between full pump-out service calls, reducing the labor involved in routine maintenance and extending the intervals between professional service. These are particularly practical for high-volume operations where the trap fills more quickly and manual scooping between service visits would otherwise be required. Semi-automatic models are available in capacities from 10 to 75 GPM.

Large-Capacity Grease Interceptors

For high-volume operations including commissaries, hotel kitchens, and institutional foodservice, large gravity-style interceptors handle peak flow rates from 75 to 500 GPM with grease capacities ranging from 150 to 1,000 pounds. These units are typically installed below floor level in the drain room and require professional installation coordinated with your plumber and local municipality. Flow rate sizing for large interceptors should be calculated based on the maximum simultaneous fixture load rather than average daily volume.

What to Consider Before You Buy

The most important specification is flow rate in gallons per minute, which must be matched to the combined peak flow of all fixtures draining into the interceptor -- not just the largest single fixture. Undersizing a grease trap is the most common installation mistake and results in grease bypassing the unit and entering the municipal sewer. Beyond flow rate, consider whether your local code requires a specific interceptor type, as some municipalities mandate gravity interceptors over hydromechanical units for larger operations. Material choice between carbon steel and epoxy-coated steel affects longevity in high-temperature applications. For related plumbing and waste management equipment, browse our full waste disposal equipment category or explore dishwashing equipment and accessories for drain-side accessories.

Shop Our Commercial Grease Traps Today

Browse the full selection above and filter by flow rate, capacity, brand, and type to find the right grease trap or interceptor for your operation.