Are you working on green projects? Have you ever found conventional sewer solutions on difficult sites costly and challenging? Perhaps you might then consider a vacuum drainage system.

If you are wondering why you would use vacuum, there are at least three reasons you might want to consider: higher return on investment, lower environmental impact and lower maintenance costs compared with traditional gravity systems. But only if you get it right! So if you are looking for smart solutions for your projects, we can work with you to recognise where vacuum will add value.

Together with our international partner Evac, HIFraser has access to over 60 years of collective, worldwide experience in vacuum toilets and vacuum collection systems. We know how to make the collection of wastewater and condensates both environmentally sustainable and economically efficient.

We design and supply vacuum systems to all building sectors including:

  • high-rise buildings incl. offices, shopping centres, supermarkets, convention centres and commercial fitouts
  • public buildings incl. historic and heritage listed sites, railway stations, airports, schools, universities, medical centres, prisons and other remote sites
  • Green Star, LEED and net-positive water usage projects.



Watch this to learn more about vacuum technology

See Vacuum Toilet in operation


We have capabilities to work directly with:

  • major plumbing contractors
  • minor works and fit out contractors
  • building owners and operators
  • developers
  • facilities managers
  • engineering and hydraulic consultants.

We work to the following standards:

  • BS EN 12109-1999 Vacuum drainage systems inside buildings
  • AS 3500.2 Sanitary plumbing and drainage
  • NCC – National Construction Code (Building Code of Australia)
  • PCA – Plumbing Code of Australia
  • WSAA Vacuum Sewerage Code of Australia (WSA 06-2004)
  • AS4310:2004 – DN80 Piston Type Vacuum Interface Valves for Municipal Sewer Systems
  • SA TS 100:2015 Technical Specification for Vacuum WC pans and interface valves intended for use with vacuum drainage systems and designs.

As part of our ongoing effort to bring environmentally sustainable and economically efficient vacuum waste management solutions to the Australian market, we have actively participated over the past 6 years within the Plumbing Products Industry Group and its Vacuum Drainage System Special Interest Group. This industry group, of which HIFraser is an active participant, is currently developing the Australian Standard for vacuum drainage systems within buildings for the benefit of the Australian Community.

We bring proven technology to our customers

Evac – The World Leader

Evac designs, manufactures and markets environmentally friendly vacuum waste and wastewater collection and treatment solutions for the building and marine industries worldwide. Evac offers a total wastewater management system for building and marine applications, with over 20,000 marine, 1,500 offshore and 2,300 building systems successfully operating around the world.

Vacuum Technology

The vacuum system is independent of gravity where the sewage is transported by negative air pressure instead of water and gravity. Water is used only for rinsing the bowl, not for transporting the waste. A vacuum system can also lift the waste vertically.

How does it work?

The Evac vacuum wastewater solution is a closed loop system, which consists of vacuum toilets, vacuum interface units, vacuum piping, vacuum collection tanks and wastewater treatment plants. The solution is based on vacuum, not gravity, which makes it possible to flush the waste horizontally or even vertically into overhead piping and if required, also around obstacles. The Evac vacuum solution is environmentally friendly. With low water use – up to 80 % less than used in traditional toilets – it reduces sewage volumes and thus meets the requirement for a small environmental footprint.

Where you would use it?

Due to their versatility and low water use, the Evac vacuum system can be implemented in numerous areas:

  • Supermarkets for condensate removal
  • Railway stations, Airports and Shopping Centres where under slab access is restricted
  • Schools and universities
  • Hospitals, Medical Centres and Laboratories
  • Heritage Listed buildings
  • High-rise Office towers
  • Exhibition Centres
  • Correctional Centres
  • Green Star and LEED Projects
  • Short Schedule Commercial Fitouts
  • Temporary and Modular sites
  • Sites below sewer level to reduce or eliminate wet wells.

Why you would use it?

The Evac vacuum solution minimises the use of fresh water for toilet flushes. At the same time it offers ultimate freedom of piping design. Additionally, the reuse of grey water contributes to a smaller water footprint at your building. The Evac vacuum toilet uses only 0.9 litres per flush as opposed to 4.5 litres for a conventional dual flush toilet. This equates to a dramatic reduction in water consumption, savings in water rates and also a reduction in the amount of sewage produced. The Evac vacuum solution additionally makes it possible to recycle grey water for reuse in toilet flushing.

During each flush, the Evac vacuum toilet consumes 60 litres of air allowing the removal of viruses, bacteria and odours from the bowl and simultaneously enhances hygiene and personal comfort in the sanitary facilities. Each Evac solution forms a closed loop and this is particularly important in certain organisations, e.g. hospitals, research facilities and prisons, where the waste must be contained or is considered high-risk.

Environmentally friendly

A conventional toilet consumes 4.5 litres of water every time it is flushed, whereas the Evac toilet uses just 0.9 litres of water per flush.

Maximum Freedom in Installation

Vacuum systems give the building designer complete freedom from the restrictions of gravity drainage. Bathrooms and toilets do not need to be tied into a services core but can be located where they best suit the design.

Design Flexibility

A vacuum system offers space planning freedom. In speculative buildings, a prospective tenant will often wish to plan the space available in a building to suit its business operation. The vacuum system gives them the extra flexibility. Final decisions on the floor plan can be delayed leaving maximum room to manoeuvre and giving the client maximum flexibility to plan space.

Savings in Costs and Time

One of the main benefits of installing a vacuum system is the real cost savings that can be made. The time required to design and install a vacuum system is significantly shorter than the time needed for traditional gravity drainage systems. This reduces on site costs and helps meet construction deadlines.

Health and Hygiene

Evac’s vacuum toilets are significantly cleaner than conventional toilets, which permit bacteria and odours to enter the atmosphere. The Evac vacuum toilets enhance both hygiene and personal comfort within washrooms by using up to 60 litres of air with each flush, removing viruses, bacteria and odours from the bowl. By encouraging the cycle of air, washrooms will stay ventilated and fresh. Every Evac vacuum system is a closed loop that is kept under a vacuum at all times, which makes it impossible for vermin to live and breed in the drainage, and securely contains all and any waste. This is imperative – especially in facilities with a high risk of contamination such as hospitals, prisons and research facilities.