Heritage Cases

The pipe replacement programme within the City of Johannesburg is one of the key strategies aimed at combating water losses and improving the level of service to the residents of the City by reducing pipe bursts. In order to create an objective pipe replacement priority list, Johannesburg Water Infrastructure Planning Section commissioned a desktop study to identify areas requiring urgent pipe replacement interventions. From the investigation and assessment, ageing is the main contributing factor to the frequent pipe bursts as most of the pipes have Remaining Useful Life (RUL) of less than 3 years. A project charter was compiled by Johannesburg Water Infrastructure Planning Section requesting for the replacement of the existing Asbestos Cement (AC) and steel pipes with uPVC on the road reserve and HDPE on the road crossings within the identified streets in Hamberg. The proposed scope of works includes the following: • Replacement of about 5934m of 100mm Ø steel pipe with 110m Ø High Impact uPVC, 994m length of 150mm Ø AC pipe with 160mm Ø High Impact uPVC and 132m length of 200mm Ø AC pipe with 200mm Ø High Impact uPVC. • Installation of HDPE pipes using the Horizontal Directional Drilling (HDD) method on major road crossings. • Location, exposing and protection of existing services. • Connecting the new network to the existing network. • Reinstatement of surfaces to original condition. • Replacement of approximately 118 domestic water meters. • Replacement of all below ground domestic water meters. The project entails the replacement of the existing reticulation water line of 50mm, 100mm, 150mm and 200mm diameters along Potgieter, Weibak, Going, Haman, Elloff, Berg, Von Brands, Eeufees, Oxlley, Bree, Skinner, Wandel, Bannie, Spies, Boles, Steyn, Hamburg and Transport Avenue streets. Total length of works is 7 640m.