Sewage flows by gravity into a collection chamber. This collection chamber stores the sewage for a short time, with reserve storage availability. When the level of the sewage inside the collection chamber rises, a starter valve activates the vacuum piston valve to open which allows the content together with air to be drained into the vacuum network. This system has the advantage that more properties can be connected to one collection chamber. The mechanisms in these collection chambers work pneumatically / mechanically, which has the advantage that no electricity is needed.

The pipe network consists of PVC or HDPE pipes. A central vacuum station keeps this pipe network under negative pressure. Due to their small diameter, the pipes can be laid at depths of 80 to 120 centimeters under the ground surface. The addition of air makes the wastewater lighter, which leads to higher transport speeds. The pipe network is laid in a ‘saw tooth profile’. Within this profile, a mixture of wastewater and air from the collection chamber is transported to the vacuum station.

The waste water from the collection chamber ends up in the vacuum tank via the pipe network. The vacuum in the tank is generated by vacuum pumps. The extracted air can, if necessary, be purified through a filter. The level in the tank is measured with a Radar level measurement. At a high level, the pressure pump (s) starts and the waste water is transported to a sewage treatment plant or discharge point in the area. The discharge pump (s) stop at a low level.