This standard applies to the drain fittings for washbasins, washbasins and bathtubs defined in Section 4. It does not apply to drain fittings for sinks and shower trays, which are specified in another standard
ONORM EN 274-1992 history
1992ONORM EN 274-1992 Sanitary tapware - Waste fittings for basins, bidets and baths - General technical specifications