Backflow Prevention Methods

摘要

Without a source of clean,safe water,neither individuals nor communities can survive.So perhaps the greatest invention of any civilization is a way to ensure clean,safe water.Supplying clean,potable water is both complicated and straightforward.The actual process is a relatively simple series of steps (extraction from groundwater or surface water sources,storage,treatment,pumping,and transmission via pipeline).The complexity occurs within each of these steps.