NBN EN 695:2005

This European Standard specifies the connecting dimensions for kitchen sinks for domestic purposes, regardless of the material used for their manufacture.
NOTE 1 For the purposes of this standard the term "domestic purposes" includes use in hotels, accommodation for students, hospitals and similar buildings, except when special medical provisions are required.
NOTE 2 The figures are given by way of example; other designs are possible.
This European Standard does not apply to industrial kitchen sinks.