What type of water system uses a private supply at around 420 KPA?

A direct pressure system is characterized by its ability to deliver water to users at a specified pressure, in this case, around 420 KPA. This type of system typically connects directly to a private water supply source without the need for additional storage tanks. The pressure in a direct pressure system is maintained through pumps, ensuring that water is available on demand at a consistent pressure. This is particularly beneficial for applications where immediate access to water is required, such as in residential or commercial establishments.

In contrast, other systems can involve additional components such as tanks and pressure-reducing valves that may not provide this direct, immediate supply. Gravity fed systems rely on elevation differences to create pressure and won’t maintain the specified pressure level consistently. Constant pressure systems strive to keep water pressure steady, while booster systems are specifically designed to increase pressure for various situations but typically do not maintain a direct and constant flow from the original supply as a direct pressure system does.