Bar
Bar is a widely used unit for water pressure. The pressure in a water pipe is usually given in bar and indicates the force with which the water is pressed against a surface (e.g. valve surface). The water pressure can be measured using a manometer.
High pressure
Drinking bowls can be fitted with different valves that are designed for high pressure or low pressure in the water pipe. If the water comes from a house connection or a pump system, you need a drinking bowl or valve that is designed for high pressure. The high pressure range for KERBL drinking bowls is between 1 - 5 bar. For pressures above 5 bar, we recommend installing a pressure reducer upstream of the drinking bowl.
Low pressure
If water is drawn from a grazing barrel or other raised container without a pump or additional pressure booster, a drinking bowl or valve for low pressure is required. The low pressure range for KERBL drinking bowls is between 0.3 - 1 bar.
Water flow rate
The water flow, volume flow or flow rate is the amount of water that flows through the cross-section of the water pipe or drinking valve per minute and is given in litres per minute (e.g. 8 l/min).