Sewer Main Line Clog in Chula Vista CA 91910DetailsClient Residential ClientCompleted August 2021Timeframe Same Day ServiceLocation Chula Vista, 3rd avenue, 91910CategoryChula VistaShare this page... Back To GallerySewer mainline backed up, unclogged through the cleanout access point. The cause of the blockage was root intrusion in the cast iron pipe. We will be replacing this pipe. Project Photos