Thank all of you for your kind responses. I am sorry that I did not make it clear. I meant to ask what makes a trunk water main different from an average water main, and a trunk sewer from a regular sewer, besides their sizes. Thanks again!
Thank you for your explanation, edCard. For subdivisions, PVC pipes are often seen as trunk water mains and sewers. I would imagine that concrete pipes shall be used as trunk water mains and sewers.
I ｒｅｃｅｎｔｌｙ ｒｅｃｅｉｖｅｄ ａ ｐｈｏｎｅ ｃａｌｌ ｆｒｏｍ ａ ｒｅｃｒｕｉｔｉｎｇ ａｇｅｎｃｙ． Ｔｈｅｙ ａｒｅ ｌｏｏｋｉｎｇ ｆｏｒ someone specifically ｆａｍｉｌｉａｒ ｗｉｔｈ ｔｒｕｎｋ ｓｅｗｅｒｓ ａｎｄ water main design. I have some experience in designing water mains, sanitary and storm sewers for subdivisions. So What makes trunk sewers and water mains...
