The integration of building services is an important aspect of architectural planning. The conceptual design of supply systems and cycles within the building demands a solid grasp of the relationships that underpin the supply and disposal of the element water. The focus here is on relations among the individual elements of the cycle, from the supply of drinking water, consumers inside the building, and the disposal of wastewater to the rehabilitation of wastewater. The subject of water conservation is present throughout as an overarching framework.Topics: Requirements for drinking water Supply connections and distribution networks in the building Wastewater disposal and use Dealing with rainwater Resource-friendly approaches