Water and sewer line need a horizontal separation of (5) five feet. Where. crossings are necessary, encase the sewer line with a continuous ductile iron pipe. of sufficient length, located such that a minimum (5) five feet separation exists. between each end of the casing pipe and the water line.
The difference has to do with cultural norms. The term 'culture' refers to attitudes and patterns of behavior in a given group. 'Norm' refers to attitudes and behaviors that are considered normal, typical or average within that group.
Norms. Social rules which define what is expected behaviour for an individual in a given society or situation. Norm-setting. The way the mass media emphasize and reinforce conformity to social norms, and seek to isolate those who do not conform by making them the victims of unfavourable media reports.