Olympic Stadium, Munich

Cost-effective, integrated solution for complex drinking water installation

With its distinctively unique architecture, Munich’s Olympia Stadium is an iconic landmark. Now nearing its 50th year of operation, it was high time for a comprehensive renovation of the sanitary facilities. Challenge: Use of the well over 100 WCs, urinals and wash basin taps fluctuates regularly between peak (i.e. maximum) usage and long periods of downtime with no usage.

Project data

Property type:Multi-purpose stadium


Completion date: 1972

Location: Munich

Country: Germany

Size: 69,000 seats

Technical planning: Obermeyer Gebäudeplanung GmbH & Co. KG., Munich

SCHELL products:
MONTUS Flow WC cistern module with MONTUS Field operating panel, MONTUS urinal module, CELIS E wash basin tap, WALIS E wash basin tap, SWS leak protection fitting, COMFORT PT angle valve with temperature sensor, SWS servers, SWS gateways


Several tens of thousands of visitors every day – and then nothing for weeks. These huge fluctuations in usage at the Olympia Stadium in Munich meant that facility managers were looking for an intelligent solution for the new drinking water installation. The following aspects needed to be accounted for:
Maintenance of drinking water quality, an option for simulating specified normal operation, best-in-class user hygiene and vandalism protection. In addition, the drinking water installation control system also needed to be integrated into the central building control system.



SCHELL was able to fulfil all of these requirements with its SWS Water Management System, electronic fittings and other components. SWS offers an option for automated, scheduled and individually programmable stagnation flushes, while fittings can be grouped together for the purpose of simulating specified normal operation. This effectively avoids any installation downtime and offers optimum support for maintaining drinking water quality. In addition, automated stagnation flushes are much more cost-effective than flushes performed manually – both in relation to more economic water consumption and in terms of human resources. Using gateways available for all popular bus protocols, SWS was integrated into the central building control system, thereby meeting customer requirements for a single control instance for all building systems. All SCHELL fittings previously installed or planned as part of ongoing renovations are robust and vandal-proof. Contactless fittings are also used, which minimise the risk of contact infections and therefore support user hygiene.

While the more public-facing parts of the Olympia Stadium had been successively modernised and renovated during the Stadium’s 50-year existence, the sanitary facilities had not been touched since it opened in 1972. In March 2022, however, with an eye on the upcoming Munich European Championships, the WC facility renovation project began in earnest and is now at the stage where long-lasting, digital solutions from SCHELL are being installed.

When the renovation project is complete, the sanitary equipment installed in the Stadium’s sanitary facilities (and fully networked with the central SCHELL SWS Water Management System) will include 194 water-saving MONTUS Flow WC cistern modules plus robust MONTUS Field operating panels, 408 MONTUS urinal modules, 90 CELIS E contactless wash basin taps and 10 WALIS E wash basin taps.

Automatic stagnation flushes – maintaining drinking water quality

The major fluctuations in use affecting sanitary facilities at the Stadium constitute a serious risk to drinking water hygiene, because the water will stagnate in the installation during periods of downtime. This could permit bacteria such as Legionella to exceed critical concentrations in the water. Stagnation flushes can be used to purge the system of stagnating water quickly and easily.

Unlike manual flushing at the fitting or the WC cistern, SCHELL’s SWS Water Management System offers a centralised approach to programming and triggering stagnation flushes automatically, as well as documenting all of the flushes performed. The software also offers centralised configuration for a wide range of fitting parameters. Fittings can also be formed into groups, allowing the simultaneous triggering of multiple fittings at a specific point in time. This has the key advantage of being able to achieve the high flow velocities in the drinking water installation that are required to create a turbulent flow and therefore to ensure the effective flushing of the whole piping system, including pipe walls.

Reduced water consumption and personnel requirements

Apart from helping to maintain drinking water quality, automated flushes also support the cost-effective operation of the Olympia Stadium. Water consumption is reduced, because significantly lower volumes of water are used than for the manual triggering of stagnation flushes. And fewer personnel are required, too: for manual flushing, extensive routine (and simultaneous) flushes would be a time-consuming job for many employees. The electronic SCHELL fittings and cistern modules perform the prescribed stagnation flushes automatically via SWS (with settings configured as appropriate).

Protection from leaks and critical temperatures

With so many fittings needing to be networked, the Stadium has deployed a total of ten SWS servers, as well as ten leak protection fittings and temperature sensors. Thanks to these leak protection fittings, the drinking water installation can be shut off either completely or partially at times when there are no users in the building. If a leak occurs, water flows are kept to a minimum. We should also point out that this isn’t a contradiction to what was said above: stagnation flushes always have priority and the leak protection fitting is opened to allow them. When stagnation flushes are triggered, leak protection fittings open automatically and are then shut off again afterwards.
Thanks to the built-in temperature sensors, temperature-controlled stagnation flushes are also possible alongside scheduled flushes: these can detect critical water temperatures and then flush the water out via electronic fittings.

With SWS, even complex drinking water installations like the one at the Olympia Stadium – with well over 100 WCs, urinals and wash basin taps – can be operated and managed effectively and conveniently. All system data, covering flush times, fitting parameters, temperature curves and much more, is recorded and documented, so that facility managers can access this data and make adjustments whenever necessary.