EVDS - Vacuum Drainage Systems
Vacuum Systems - Vacuum Technology - Vacuum Drainage Systems - Vacuum Toilets - Vacuum Pumps
EVDS are the sole UK agent for Evac Vacuum Systems, which were first introduced more than 40 years ago in building applications. Evac’s vacuum technology has proven to be a winning combination of reliability and durability. The Evac vacuum toilet solution minimises the use of fresh water for toilet flushes. At the same time it offers you ultimate freedom of piping design. Additionally, the reuse of grey water contributes to a small water footprint at your building.
Today EVDS are the premier supplier of vacuum systems to the UK Building and Industrial markets with most major supermarkets using Evac Systems. Over 100 buildings in the UK are now equipped with a vacuum drainage system, from space age hotel concepts such as Yotels, high tech laboratories like Diamond Light Source and everyday office blocks for Vodafone to special buildings like St Pancras International Railway Station and Heathrow T5.
Benefits of the Evac Solution
For building designers:
- Increased design flexibility
- No requirement for soil stacks or vents
- Pipes can be routed over & around obstacles
- Manufactured to European Standard ISO 9001 with BBA Certificate
- Opportunity for designers to earn LEED points for new building
For building owners:
- Less water required (only 1.2 litres per flush) = savings in water costs
- Less need for fresh water production, water treatment & storage
- Increased planning options
- Increased hygiene & better air movement in sanitary facilities
- No need for piping ventilation
- Flexible design & easy adjustment of future store plans
- Short construction schedules with minimum customer disruption
- No concrete & tile work when relocating or adding display cases
- Lower costs compared to under slab gravity waste piping
- No blocked drains & odours from under slab waste piping
- Quick & easy last minute floor plan adjustments
- Safe, reliable & easily maintained waste collection system
The Evac Vacuum Toilet looks like any conventional toilet, but instead of relying on gravity it creates a powerful vacuum to flush the toilet. Water consumption is very low – only 1.2 litres per flush. Because the operation is purely pneumatic, no electrical connections are needed.
Vacuum Interface Units
The Vacuum Interface Unit is similar in operation to the Evac Vacuum Toilet. The manually operated push button is replaced by an activator which is triggered when a static head has been built up in the buffer water tank. The whole operation is automatic and, once again, no electrical connections are required. The Vacuum Interface Unit allows standard bathroom and kitchen fittings to be connected to the Vacuum Drainage System. The Interface Units are operated automatically and are installed on the floor in a void space or overhead. The unit consists of a discharge valve, activator, aerator and buffer tank or sump.
Vacuum Collection Units
The Vacuum Collection Unit creates the vacuum for the system and is the only part of the system that consumes energy. It consists of a vacuum tank, vacuum pumps, discharge pump and operating control panel. The size and number of tanks and pumps depend on the size and type of the project, number of toilets, frequency of use, etc.
Waste-Water Treatment Plants
Vacuum systems also lend themselves to the recycling of grey water. Once again, the flexibility of the vacuum system allows you to bring all the grey water from the building back to one location to be forwarded to your treatment plant. Evac can offer a wide range of sewage treatment plants from biological sewage treatment plants to membrane bio-reactors for recycling grey water to be used as toilet flush and irrigation water or the safe disposal of black water. The plants have been designed to minimise technical problems and to maximise total process reliability.