HDPE Pipe Inspection Ports (Vertical Inspection Ports) are primarily used to check for blockages or other issues in drainage pipes within siphon rainwater drainage systems, gravity flow drainage systems, and building level drainage systems. These ports are equipped with lids for inspection, which have a rubber seal inside. To inspect, the lid is unscrewed, allowing a view of the inside of the drainage pipe. The rubber seal within the lid must ensure a good seal and prevent any leakage. Our HDPE vertical inspection ports are made from pure new materials and meet all relevant standard specifications. Available sizes include: De50/63/75/90/110/125/160/200/250.