File:Laying sewer hi res (2).jpg

Summary
Description English: PVC is used extensively for sewage pipe due to its low cost, chemical resistance and ease of jointing Date	15 October 2012, 14:25:28 Source	www.pvc4pipes.com Author	Steve Tan [steve.tan@pvc4pipes.com]

https://en.wikipedia.org/wiki/File:Laying_sewer_hi_res_(2).jpg