DIN 18861-4
DIN 18861-4 Equipment for commercial kitchens - Dishwashing facilities and sinks - Part 4: Wastewater sink, Requirements and testing
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2008