Suitable for all dairy farm sizes, the Water Chiller requires sufficient space to accomodate a water tank and water chilling unit - and depending on the volume of milk per milking the water tank size can vary from 10,000 to 30,000 litres (2,600 to 7,900 gallons).

The size of the Water Chiller unit and volume of the water tank determines how long it takes to bring the water in the tank down to the recommended temperature - often around 6°C (42.8°F) enabling milk to enter the milk vat at around 9°C (48.2°F). The chiller on the vat then reduces and maintains the milk temperature to the industry standard, generally between 4°C and 6°C (39.2°F and 42.8°F). Similar to Ice Banks, the unit chills milk between milkings with little or no impact on electricity supply - with the chilled water cooling the milk through the on-farm plate cooler.