How Grease Traps Work to Keep Water Supplies Clean

As plumbers, we've seen our fair share of clogged drains and pipes. But did you know that one simple solution can make a world of difference in preventing these issues? Enter the humble grease trap. Also known as a grease interceptor, this clever device is designed to catch solid substances before they cause problems downstream. 

In this post, we'll explore how grease traps work and why they’re an essential addition to any plumbing system.

What is a Grease Trap?

A grease trap is a specialised device designed to catch fats, oils and grease, which are common culprits behind clogged drains and pipes. These substances are generally used heavily in many kitchens, which can lead to significant issues if let flow into the water supply.

When these substances enter the drainage system, they can solidify and cause blockages, leading to costly repairs and messy cleanups. A grease trap is designed to intercept them before they can cause damage, ensuring your drains remain flowing freely and your kitchen can keep serving customers.

How Does a Grease Trap Work?

A grease trap is designed to catch fats, oils and grease by utilising a clever combination of gravity, surface tension, and buoyancy. Here's a more detailed breakdown of the process:

• Separation Chamber: The first chamber of the grease trap is where the magic happens. As wastewater flows into the chamber, it slows down and cools down, which causes the fats, oils and grease to separate from the water. This is due to the difference in density between these substances and water. Even in their liquid state, fats, oils and grease are denser than water, so they tend to sink to the bottom of the chamber.
• Settling: As the wastewater flows into the chamber, it forms a layer on top of the settled fats. This layer is known as the "water-clear zone." The denser substances will continue to settle at the bottom of the chamber, where they form a thick, tar-like substance.
• Floating Layer: The next stage is where the fats rise to the top of the chamber, forming a floating layer. The floating layer is characterised by its bright yellow or brown colour and its ability to stick to surfaces.
• Skimming: Regular skimming is essential to remove this floating layer from the top of the chamber. Skimming can be done manually or automatically, depending on the type of grease trap. Manual skimming typically involves scooping out the fats with a bucket or trowel, while automatic skimming uses pumps or other mechanisms to remove them.
• Drainage: Once the fats and other solids have been removed, the remaining wastewater flows out of the chamber and into the drainage system. The water that exits the grease trap is now free from pollutants, reducing the risk of clogs and other plumbing issues downstream.

By understanding how a grease trap works, you can appreciate its importance in maintaining a healthy and functioning plumbing system. Whether you're dealing with a clogged drain or simply looking to prevent future problems, a grease trap is an essential tool for any kitchen that uses high levels of fats, oils and grease.

Types of Grease Traps

Grease traps come in various shapes, sizes and types to suit different applications, from small-scale domestic use to large-scale commercial kitchens, including:

Point-of-Use

For domestic households, point-of-use grease traps are a popular choice. These compact, self-contained units are installed under sinks, near appliances, or in laundry rooms. They are designed to capture fats and solids at the source, preventing them from entering the main drainage system.

They’re a popular choice for providing peace of mind while you cook and clean. These grease traps are compact, discreet, easy to install and low maintenance, making them ideal for residential uses.

Large In-Ground Tanks

For commercial kitchens, large in-ground tanks are often used to handle high volumes of fats, oils and grease. These tanks are typically installed underground and can be designed to accommodate various flow rates and capacities.

Due to their large capacities, these tanks generally have easy-access lids or hatches so they can be cleaned out regularly to prevent buildup or overflow.

Keep Water Sources Clean and Healthy with Grease Traps

In conclusion, grease traps are unsung heroes when it comes to maintaining your plumbing system. By understanding how they work, you can appreciate the importance of installing one in your home or business and keeping it well-maintained. 

At Tropical Coast Plumbing, we specialise in cleaning and maintaining grease traps. Our expert team is dedicated to providing top-notch service and solutions for all your plumbing needs, to ensure your water flows freely and water sources are clean and healthy. 

Contact us today to learn more about how we can help you keep your drains flowing smoothly!