Both the cold and hot water connections to the Enduce floor drain are equipped with type-approved backflow preventers to ensure water-safe connections to the cold and hot water systems. The location and protection level of the backflow preventers are verified by RISE with regard to current standards and industry regulations.
In-depth information: Household applications constitute a special case in SS-EN 1717 for which the requirement for backflow protection for liquids in categories up to category 5 is considered with regard to requirements for backflow protection corresponding to liquid category 2-3 for the standard in general. For Enduce's solution, this means that it is marginally sufficient in relation to standard requirements to supply hot water via a protection unit of design EB (non-controllable spring-loaded check valve) upstream with the shut-off valve used to maneuver the hot water to hot water cleaning. The check valve for the cold water supply is located before the cold water from the cold water network of the property connects to the heat exchanger.
