A vacuum system where vacuum is maintained in the piping at all times. Used in large systems with more than 4 to 10 toilets and/or long pipes.
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.