2016GOST 23289-2016 Waste water drain sanitary accessories. Specifications
1994GOST 23289-1994 Waste water drain sanitary accessories. Specifications
1979GOST 23412-1979 Waste water drain sanitary accessories. Types and principal dimensions
GOST 23412-1979 Waste water drain sanitary accessories. Types and principal dimensions was changed to GOST 23289-1994 Waste water drain sanitary accessories. Specifications.