BS EN 1717:2000 Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow
BS EN 1717 deals with the means to be used to prevent the pollution of potable water inside premises and the general requirements of protection devices to avoid pollution by backflow.
The hygiene protection specifications of this standard are applicable to all the standards for systems or appliances connected to the private supply system for water intended for human consumption.
BS EN 1717 specifies the minimum requirements for product standards of protection units. The product standards are used to detail product specifications. In the absence of a product standard, BS EN 1717 is used as a reference in order to draw up a specification for the products out of new development.
Contents of BS EN 1717:
- Foreword
- Introduction
- Scope
- Normative references
- Terms and definitions
- Pollution of potable water: general observations
- Backflow of used water
- Connection
- External influences
- Materials
- Stagnation
- Harm caused by inadequate or improper maintenance
- Analysis method of the risks at the point of use and choice of protection
- General remarks
- Determination of fluid categories which are or could be in contact with potable water
- Determination of the installation characteristics
- Separation by single or double walls
- Air break to drain
- Installation matrix
- Protection units
- Matrix of the protection units appropriate to fluid categories
- Point of use protection for equipment at the draw-off point for domestic uses
- Choice of the protection units to be implemented
- Location of the protection units
- Point of use protection of particular equipment for non domestic uses
- Protection at the connection point to the public potable water system
- Air break to drain
- Reference list of the protection units
- Guide table for determining the fluid category from which protection is required Summary of the analysis method
- Bibliography
