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.
Social Norms. Social norms are a broad set of prescriptions, both explicit and implicit, that dictate behavior in particular situations. They vary from culture to culture and often change over time. Norms can also change based on subculture and setting.