Why is a pressure pump required when using a storage tank?
These are generally used in the aforementioned two-pump systems. A typical setup is as follows: the submersible pump fills a storage tank, and the water from the storage tank is pressurized by the second (jet) pump. A pressure tank is also used so that the jet pump only cycles occasionally. Jet pumps come in many sizes, half-horsepower being a popular choice for a small residential system. Installation location varies. The jet pump is often mounted on top of the pressure tank, other times in a separate location, but usually outside of the living space, since the pump does make some noise. Constant pressure systems are also available. These systems require only a small pressure tank, and the pump itself may be located inside the storage tank, or even down the well in a single pump setup.
