This is the British English definition of SOLE. View American English definition of SOLE. Change your default dictionary to American English. View the pronunciation for SOLE.
Deadband is also known as hysteresis and is the amount of a measured variable (pressure, temperature, etc.) between the point where a switch closes and then re-opens. It can be implemented is software if you have an analog input (i.e., open at 1.02 PSI, close at 0.98 PSI) or designed into a switching mechanism. Often the deadband of a switch is fixed and cannot be adjusted. A typical example is in a wall thermostat in your house.
When the water in the pressures tank drops below the required amount, a pressure switch is activated turning on the pump. The pump then refills the pressure tank. The combination of the pressure tank, pressure switch and the pump is what allows water to flow through your home. Pressure tanks, which also act as reservoirs for the home, are generally set to keep pressure within 20 pounds per square inch (PSI) of your starting and stopping parameters.