7 Best Grease Traps For Commercial Style Home Kitchens

Homeowners who enjoy batch cooking, canning, or hosting large family gatherings often find that a standard residential kitchen sink simply cannot handle the volume of fats, oils, and grease (FOG). Installing a grease trap prevents costly plumbing backups and protects the longevity of the home’s drainage system. Selecting the right unit transforms a high-traffic kitchen into a professional-grade space capable of managing heavy usage without the headache of clogged pipes.

Zurn P6000-GR: The Overall Workhorse Option

For those who treat the kitchen like a full-scale culinary operation, the Zurn P6000-GR stands out as a top-tier performer. This unit is built to withstand high volumes of wastewater, making it ideal for homes with large families or hobbyists who do a significant amount of deep frying or large-scale meal prep.

The construction is impressively robust, designed specifically to prevent any leakage or bypass over long periods of heavy use. It manages to balance industrial-strength filtration with a design that is surprisingly manageable for the average homeowner to monitor.

While the price point is higher than entry-level traps, the durability makes it a smart investment for those planning to stay in their homes long-term. It essentially eliminates the worry of kitchen drain clogs caused by FOG.

Canplas Endura 3914: Best Under-Sink Install

Space is often the primary constraint in residential kitchens, particularly when retrofitting a grease trap into an existing cabinet layout. The Canplas Endura 3914 is engineered with a compact, user-friendly profile that fits neatly into most standard sink base cabinets without sacrificing structural integrity.

The unit utilizes high-quality thermoplastic materials, which are naturally resistant to the corrosive nature of kitchen waste. Its lightweight design makes the initial installation process much smoother, especially when working in the tight, awkward confines beneath a sink.

• Ideal for standard 30-inch or 36-inch sink base cabinets.
• Features a rapid-release lid system for quick access during maintenance.
• Highly effective for homes with moderate, consistent daily cooking routines.

Watts WD-20: Best Compact Size for Tight Fits

When the undersink area is already occupied by a water filtration system or a large garbage disposal, the Watts WD-20 offers a solution that prioritizes floor space. Its slim, vertical profile is designed for kitchens where every inch of cabinet real estate is accounted for.

Despite its diminutive size, this trap maintains the same efficiency ratings as many larger units. It excels in small apartments or homes with galley-style kitchens where a traditional, bulky grease interceptor simply won’t fit.

The trade-off for its compact design is a slightly more frequent cleaning schedule. However, for those with limited space, this is a reasonable compromise for the protection it provides.

Mifab MI-G-15: Simple, No-Fuss Reliability

Sometimes the most effective tool is the one that does its job without unnecessary complexity. The Mifab MI-G-15 is favored by those who want a “set it and forget it” solution, as its design is straightforward, intuitive, and devoid of overly intricate components that might break down.

Its steel construction is designed for longevity, providing a sturdy barrier between the sink and the main sewer line. It is a workhorse that handles high-temperature wastewater well, making it a favorite for those who use dishwashers or large pots of boiling water frequently.

If you value consistency and a no-frills approach to home maintenance, this model is a reliable choice. It lacks the bells and whistles of some modern units, but it delivers on its primary function every single time.

Ashland Poly-Trap: Best for Easy Maintenance

Cleaning a grease trap is rarely a task anyone looks forward to, but the Ashland Poly-Trap is specifically designed to make this chore as painless as possible. The interior surfaces are smooth, which prevents hardened grease from sticking, allowing for a much faster cleanup session.

This unit is constructed from high-density polyethylene, a material that is exceptionally durable yet light enough to maneuver easily during the bi-monthly cleaning process. Its design emphasizes accessibility, ensuring you won’t need specialized tools or professional help to clear it out.

• Non-stick interior coatings simplify the manual scraping process.
• Includes a clear, easy-to-read capacity indicator.
• Excellent for homeowners who prefer handling their own maintenance tasks.

Rockford GT2-20: For Serious Home Cooking

Serious home cooks who manage multiple batches of stock or handle high-fat ingredients will appreciate the heavy-duty nature of the Rockford GT2-20. This unit is built to manage significant FOG volume without requiring constant attention, making it the closest thing to a commercial-grade system available for residential use.

Because of its size and capacity, this is best suited for houses with larger basements or utility rooms where the trap can be installed near the kitchen floor. It provides peace of mind that even the most demanding kitchen cleanup will not lead to a main line blockage.

While it requires more space for installation, the trade-off is superior filtration capacity. It is an investment in the long-term health of your home’s plumbing infrastructure.

Josam 21520: The Heavy-Duty Steel Choice

For those who prioritize metal over plastic, the Josam 21520 offers the rugged durability of a traditional steel grease interceptor. This unit feels substantial, and its build quality reflects a standard of engineering that feels built to last for decades rather than just a few years.

This is the preferred choice for homeowners who are concerned about the long-term thermal expansion or potential cracking of plastic models. It handles the extremes of a busy kitchen, including very hot water and heavy debris, with absolute ease.

It is heavier to install, often requiring a bit of extra help to position correctly. Once it is in place, however, it remains a permanent, reliable fixture of the kitchen plumbing system.

How to Pick the Right Size for Your Kitchen Sink

Selecting the correct size is determined by the flow rate of the sink, not just the physical space under the counter. A trap that is too small will overflow, while one that is too large may not separate the grease effectively before it hits the drain.

• Measure your sink’s gallon capacity: A standard kitchen sink is usually between 8 and 10 gallons.
• Calculate the flow rate: This is typically determined by the pipe diameter—most residential sinks use 1.5 or 2-inch piping.
• Consult the manufacturer’s flow rate chart: Always match the sink’s output to the trap’s GPM (Gallons Per Minute) rating.

If you are unsure, err on the side of a slightly higher capacity model. It is always safer to have more buffer room than to risk a backup during a large cooking session.

A Realistic Guide to Cleaning Your Grease Trap

A grease trap is only as effective as its cleaning schedule. Most households will find that cleaning the unit every one to three months is sufficient, depending on the frequency of heavy frying and the number of people in the house.

1. Place a bucket beneath the trap before opening the lid to catch any spillover.
2. Carefully remove the cover and scrape the grease into a sealed container for trash disposal—never pour it back down the drain or into the toilet.
3. Wipe the interior walls with a paper towel or specialized scraper to remove film buildup.
4. Check the gasket for any signs of wear or cracking before resealing the unit.

Always wear gloves and a mask during this process. Despite the odor, it is a straightforward task that prevents expensive emergency plumbing calls.

Installation: When to Call a Plumber for Help

While some handy homeowners can tackle a grease trap installation, it requires a solid understanding of local building codes and pipe venting. If the project involves cutting into existing slab foundations or significantly modifying the drain stack, it is time to bring in a licensed professional.

A plumber will ensure the trap is correctly vented, which is essential to prevent air locks and ensure the water flows through the system as intended. Professional installation also guarantees that the trap is properly sealed, preventing sewer gases from leaking into the kitchen area.

Even if you handle the purchase and research yourself, having a professional execute the final connections is worth the cost. It ensures your kitchen remains safe, code-compliant, and leak-free for years to come.

By carefully choosing a grease trap that matches your specific household needs, you can transform your kitchen into a worry-free zone. Focusing on the right size and maintenance habits now will save you from the stress of plumbing disasters down the road.