Historical
DIN EN 997:2008
WC pans and WC suites with integral trap; German version EN 997:2003+A1:2006 (Foreign Standard)
This standard specifies constructional and performance requirements together with test methods for close-coupled suites, on-piece WCs and independent WC pans with integral trap used for personal hygiene manufactured from vitreous china or stainless steel. This standard does not apply to squatting toilettes, WC pans without integral trap, flushing cisterns as separate appliances. Flushing cisterns are covered by other standards and the reference to cisterns in this standard is related only to the definition and requirements of flushing volume.
Deutsches Institut für Normung [din]