Drain and sewer systems outside buildings - Design - Part 1: Layout principles
This document specifies requirements for the design of drain and sewer systems outside buildings.It is applicable to drain and sewer systems from the point where the wastewater leaves a building, roof drainage system, or paved area, to a point where it is discharged into a wastewater treatment plant or receiving water body.This document specifies requirements for the layout of drain and sewer systems.
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