Deep Well Pumps can also be referred to as convertible jet pumps. This means that the pump can be used in either shallow or deep wells. In a shallow well setup, an ejector kit (or jet kit) is built in or attached to the pump. For deep wells, the kit is placed down in the well.
#2 Can you use a jet pump without a pressure tank?
What if I don't have a pressure tank? Pumps will work without a pressure tank, as there are automatic pumps fitted with a constant pressure controller so these pumps start and start on demand. We recommend having a pressure tank particularly when you have a shower or a toilet where the pump is rarely operating at 100%