View images

Print Page

View Images

Replacement of conventional gravity systems

The deterioration of ground conditions can often lead to developers turning to vacuum sewerage systems as a replacement for failed gravity systems. The advantage of the Redivac systems is that they do not need or rely on gravity falls, with the vacuum mains being laid parallel to the ground surface with nominal cover. Deep excavations are therefore not required and installation can be carried out with minimum disruption to the ground below.


Redivac systems can be fully integrated with existing gravity systems. Flows can gradually be diverted over a specified time period and sometimes it is possible to convert existing gravity manholes to house the Redivac equipment. Alternatively, flows can simply be intercepted upstream by the use of a new shallow valve chamber.


The built in flexibility of the Redivac vacuum sewerage system makes it the ideal choice for the replacement or upgrading of conventional gravity systems, with minimal groundworks and fast installation times.