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An under-sink grease trap, installed above ground, is one of the most widely used grease management solutions in the UK foodservice sector. Suitable for a broad range of commercial kitchen environments, the system is installed directly beneath or adjacent to a sink and separates fats, oils and grease (FOG) from wastewater before it enters the drainage network. For many foodservice operators, this provides a practical and efficient way to prevent blocked drains, reduce maintenance issues and protect the drainage system from excessive grease build-up.
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During everyday kitchen operations, including washing pots, pans, crockery and catering equipment, significant amounts of fats, oils and grease enter the wastewater stream. Without effective grease separation, these substances would accumulate inside pipework and drainage systems. An under-sink grease trap slows the flow of wastewater, allowing grease and oil to rise naturally to the surface where they are retained within the unit, while treated water continues through the drainage system. This process helps keep pipework clear and significantly reduces the risk of costly blockages and drainage problems.
Above-ground grease traps are commonly installed in restaurants, takeaways, quick-service restaurants, cafes, coffee shops, sandwich bars and small to medium-sized commercial kitchens. They are also frequently used in hotel kitchens, staff canteens and contract catering facilities, particularly where there is insufficient space or no practical option for installing an underground grease separator. Their above-ground design makes them highly accessible, flexible and suitable for a wide variety of commercial foodservice applications.
One of the key advantages of an under-sink grease trap is that it can usually be installed without extensive building work or major alterations to the premises. The unit can be connected directly to the sink and existing drainage system, allowing it to become operational quickly and with minimal disruption. This makes it an ideal solution for both new commercial kitchen projects and existing foodservice premises where structural modifications are limited. Thanks to its compact footprint, the system occupies very little space while delivering effective grease separation as part of everyday kitchen operations.
Maintaining high hygiene standards is essential in any professional kitchen, which is why routine grease trap maintenance is critical. The unit should be emptied and cleaned at regular intervals to prevent excessive grease accumulation and maintain optimal performance. Modern grease traps are often manufactured from smooth, durable polyethylene or similar materials that minimise grease adhesion and simplify cleaning procedures. This helps ensure consistent performance, supports hygiene compliance and extends the operational lifespan of the equipment.
An above-ground under-sink grease trap is a dependable and practical solution used throughout the foodservice and catering industry. In addition to protecting drains and reducing the likelihood of blockages, it helps commercial kitchens operate efficiently without unnecessary interruptions. Combining ease of installation, operational flexibility and effective grease separation, it remains one of the most popular and widely adopted grease management solutions for professional kitchen environments across the UK.
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