Scientists, public and private water management organisations and end-users, technology providers (SMEs), support RTD experts and relevant public authorities within DESSIN testing and validation and demonstrate innovative solutions at five demo sites across Europe with a particular focus on urban areas. Inrigo’s contribution to DESSIN is to demonstrate a technology for point cleaning of overflow water from treatment plants and pipe systems for sewage handling. This is based on high-speed filtration (HRF) and adapted to the Nordic climate. Inrigo AS cooperated with Oslo municipality and was financially supported by SkatteFunn and by the 7. Framework programme for Research and Development in the EU.