HDPE pipes shall be double wall corrugated (DWC) conforming to IS: 16098 & Jointing pipes and fittings shall be rubber ring.  Excavation of HDPE Double Wall Corrugated Pipes for Sewerage System Alignment and grade of DWC  HDPE Pipes The sewer pipes shall be laid to alignment and gradient shown on the drawings but subject to such modifications as shall be … [Read more...]