Sydney Water rehabilitates 635m DN 500 Sewer Rising Main using the Primus Line System

A DN500 unlined cast iron sewer rising main constructed in 1937 experienced multiple failures in rapid succession recently. A decision to urgently reline the main using the Primus Line? system was made to prevent failure reoccurrence. Civil works including the relining works were carried out by Sydney Water’s internal crews with some assistance of their contractors. The golf course, where most of the main is situated, remained open during the entire project phase.

• Transported Fluid: Residential waste water
• Host Pipe: DN500 CI                                            
• Operating Pressure: 2 bar                                  
• Primus Line? System: DN 500 PN 16
• Total Length: 635 m (one continuous pull)
• Bends: 1 x 70°
• Number of Sections: 1

The Primus Line system:

Primus Line? is an innovative technology for the trenchless rehabilitation of pressure pipelines for different media such as water, waste water, gas and oil. The process is based on a flexible high-pressure pipe and a connection technology developed specifically for this system. Primus Line? is suitable for the transportation of various liquids in the field of water and holds drinking water approvals in numerous countries.

The ideal flow characteristics caused by an extremely smooth inner coating and the optimised systems for high-, medium- and low-pressure requirements make Primus Line? an economical solution for the rehabilitation of ageing pipelines. Thus, water authorities and network operators benefit from reliable operation and a sustainable investment in their fixed assets.