Low pressure of water can be quite a nuisance and make simple tasks like bathing, shaving, and brushing your teeth a hassle. Introducing a booster pump into your water line can bring the water to the desired pressure, and make it easier to move water from an overhead tank to all points that use water in a household.
Low water pressure is because you are distant from the water source, or there is not enough height for the pressure to build up by gravity. An increase in the number of systems using a common water source can also lead to lowering the pressure.
These boosters improve the rate of flow and have a motor that drives impellers. The water comes in through an inlet, is subjected to the fan action of the impellers, and leaves through an outlet with the pressure boosted. Pumps can also use oscillating diaphragms to force the water out.