Rainwater is most often pumped to the house, although gravity can be used in some cases to direct rainwater to fixtures in the house.
A pressure-tank pump is used to supply rainwater when required. When the tap is turned on, or the toilet flushes, the pump is activated and gently pumps water to fill the cistern, or enter the kitchen sink or washing machine.
The tank on top of the pump permits water to be pumped under pressure. Instead of the pump turning on every time the tap is opened, the pressure inside the cylinder may be enough to supply the water to the house fixture.
The pressure-tank pump system is only one of many ways to supply the household. GRS provides advice on a number of different types of pumps, as each has particular applications.