Vacuum sewerage systems utilise vacuum pressure and gravity for the collection, conveyance and disposal of sewage through a piping network that can be routed above ground.
Vacuum drainage piping can be routed where most convenient including overhead or through voids in ceiling spaces, eliminating the need for under slab piping and providing owners and designers unlimited freedom to locate fixtures or equipment throughout the facility.
Avac vacuum toilets use as little as 0.7 litres of water per flush, providing a significant reduction in annual water and sewage costs when compared to conventional toilets. This is of great benefit anywhere, especially in areas where water conservation is important, or in areas where sewer mains or treatment facilities are already heavily impacted.
Pipe sizes in a vacuum drainage system are significantly reduced – in most cases up to 50%. And because the system is closed, there is no requirement for venting and associated roof penetrations. In addition, unlike conventional slope requirements of gravity drainage systems, vacuum system drainage piping requires minimal fall that can be recovered at intervals and can be conveniently routed around obstacles.