The vacuum toilet has been designed particularly as a water saving device and for maximum convenience. It is available for wall or floor mounting. Both models are available in china and the floor-mounted model is also available in stainless steel.

The vacuum toilet is fully equipped with interface valve, water valve and controller. It requires only one litre of water per flush but approximately 60 litres of air are also sucked into the system to assist in transporting the wastewater through the pipe network to the vacuum station.

The toilet has a stainless steel nozzle on either side of the bowl through which rinsing water is sprayed. The diameter of the vacuum toilet outlet pipe is approx. 50 mm and is connected to the sanitation system by a pipe of similar size. All waste passed through the vacuum toilet will therefore pass through the entire pipe network.

The vacuum toilet operates as follows:

Step 1: The user pushes the push-button, the interface valve is opened and the wastewater is evacuated. Air is also sucked into the system. At the same time the clean water valve is opened and rinsing water is sprayed into the bowl.

Step 2: The vacuum valve is closed but the water valve remains open. A small amount of fresh water is sprayed into the bowl.

Step 3: The water valve is closed, a small volume of clean water is retained in the bowl and the toilet is ready for use.

The vacuum toilet has been tested for compliance with European standards.

Vacuum technology is also being used for shower water, washing basins or urinals.   more infos on indoor vacuum go here

Situation:
The operator ?Tank & Rast? had decided to rebuild the rest house Würzburg South along the German Autobahn A3 between Frankfurt and Nuremberg instead of renovating the old one. There were several innovations in planning the new building. Reducing the water consumption significantly was one of them.

Solution:
The highest water quantities were wasted for flushing the toilets. They decided to install vacuum toilets which need only 1 liter of water per flush. This was the highest potential of water saving and the results show that the calculations were correct. The water bill has been reduced by about 66 % compared to the old one. The amortisation of the installed vacuum system will be reached after some 4 years operation.

Technical Data:
- Type of Installation: Compact Station Type 140 Vessel: 1,800 l Vacuum Steel Tank
- Vacuum Pumps: 2 x 3.0 kW, 125 m3/h
- Discharge Pumps: 2 x 4.0 kW
- Components: 19 x vacuum Toilets; 3 x Evacuation Units Type 2; 3 x Aeration Valves
- Commissioning: December 2002