When it comes to building services and drainage design, innovative solutions that improve sustainability, flexibility, hygiene, and cost-efficiency are no longer “nice to have” — they’re essential. One such solution increasingly gaining attention across the UK and Europe is vacuum drainage systems — and for good reason.
At EVDS (European Vacuum Drainage Systems), we’ve been supplying and supporting vacuum drainage solutions across a wide range of sectors for over 20 years, helping architects, engineers, and developers rethink wastewater management.
Myths vs. Modern Vacuum Technology
Many professionals first encounter vacuum toilets and drainage systems in aircraft or trains — environments that don’t always showcase the technology at its best. However, modern vacuum drainage systems used in buildings are very different: they look and feel like conventional toilets, yet operate without the need for a traditional cistern because the flushing mechanism is pneumatic.
conventional WCs
Contrary to common misconceptions, vacuum toilets are:
- Quiet in operation — comparable in noise level to standard toilets.
- Highly efficient with low water usage per flush.
- Simple to integrate into building designs thanks to modern engineering.
These points help dispel myths and highlight why vacuum drainage is increasingly specified on major projects.
Common Problems with Traditional Drainage — And How Vacuum Drainage Solves Them
Design Freedom and Flexibility
Unlike traditional gravity systems that rely on slope and excavation to move wastewater, vacuum systems operate under negative pressure. This means:
- Pipes can run horizontally or even upward.
- Waste can travel long distances quickly without deep trenches.
- Layouts need only shallow falls, which reduces installation disruption.
This flexibility doesn’t just make installation easier — it makes vacuum systems ideal for:
- Refurbishment projects
- Heritage sites
- Complex commercial buildings
- High-traffic facilities like airports and stations
In fact, examples of buildings that have successfully adopted vacuum drainage include Heathrow Terminal 5 and St Pancras International Station — proving the practicality of this technology on major builds. Read more about Benefits of EVAC Solutions here.
Water Efficiency: A Core Benefit
One of the most compelling advantages of vacuum drainage is water savings. Because vacuum toilets use airflow rather than large volumes of water to flush waste:
- Each flush typically uses just over 1 litre of water, compared with 3.5–9 litres for standard toilets.
- This can drastically reduce overall water use in high-use buildings.
Reducing water consumption isn’t just good for your utilities budget — it also strengthens sustainability credentials and supports environmental goals. Many developers and facilities managers are now valuing vacuum drainage as part of wider resource-efficient building strategies. Read more about this on our blog post – Water Savings up to 90%: How Vacuum Drainage Supports Sustainability Goals.
Less Risk, More Control
Vacuum drainage isn’t just flexible and sustainable — it can also be more resilient in certain conditions:
- A leak in a vacuum pipe means air enters the system, not wastewater escaping — making issues easier to detect and manage.
- Because wastewater moves quickly through small-bore pipes at high velocity, the risk of blockages is reduced.
This level of control is particularly valuable in buildings where hygiene, uptime, and access are key considerations: think hospitals, transport hubs, stadiums, and schools.
Regulatory Recognition and Confidence
Vacuum sanitary systems are recognised within building regulations as a valid alternative to traditional gravity or pumped systems — and their design and installation are supported by standards such as BS EN 12109: Vacuum Drainage Systems Inside Buildings.
This alignment with formal guidance gives specifiers confidence that vacuum drainage isn’t experimental — it’s industry recognised and technically sound.
What This Means for Your Next Project
Whether you’re planning a new build or refurbishment, vacuum drainage systems offer a strategic advantage:
- Significant water savings
- Greater layout and design flexibility
- Simplified installation with fewer excavations
- Reduced risk of odours and blockages
- Enhanced sustainability performance
At EVDS, we support everything from early design planning to delivery and after-sales service, offering bespoke system guidance and vacuum technology expertise tailored to your project’s needs.
Ready to explore vacuum drainage for your building or development? Get in touch with EVDS today to discover how this innovative approach to wastewater management can elevate your next project.