How an Undersink Chiller Filtration System Works
In Summary An under sink chiller filtration system is a modern, convenient way to enjoy refreshingly cold, filtered water straight from your tap. By combining effective filtration with efficient cooling, it provides a clean, sustainable alternative to bottled water all while staying neatly out of sight under your kitchen sink.
An under sink chiller filtration system is a convenient and spacesaving solution that provides instant chilled, filtered water straight from your tap. Often installed alongside hot water boilers or standard filtration systems, it ensures you always have access to cool, refreshing drinking water without the need for bottled water or refrigeration.
The system works in two key stages: filtration and chilling.
1. Filtration
As with any high-quality drinking water system, the process begins with filtration. Water from the mains supply first passes through a dedicated filter installed under the sink. This filter is designed to remove common impurities such as chlorine, sediment, heavy metals, and unpleasant tastes or odors. The result is clean, fresh-tasting water that is safe and enjoyable to drink.
The type of filter can vary depending on the system it may include activated carbon, ceramic, or even reverse osmosis filters, depending on the desired level of purification.
2. Chilling
Once the water is filtered, it moves into a compact chiller unit, also installed under the sink. The chiller uses a refrigeration process similar to what you’d find in a standard fridge. Inside, a cooling coil or plate rapidly lowers the temperature of the filtered water and keeps a small amount of it chilled and ready to use at all times.
The unit is thermostatically controlled, meaning it keeps the water at a consistent temperature (usually around 4–10°C), depending on the model and settings. Like the boiler system, it cycles on and off as needed to maintain that temperature, making it energy-efficient.
When you turn on the special tap, the system delivers instant chilled, filtered water. This is especially useful in warm climates or for users who prefer cold drinking water without waiting or using ice cubes. Some systems use a dedicated tap just for chilled water, while others are part of a 3-in-1 or 4-in-1 tap setup that combines hot, cold, filtered, and chilled options in one fixture.