Luxembourg Drinking Water Tank

These windows were custom-built for SEBES, the national water company of Luxembourg. The client installed them in a water treatment plant located in Eschdorf, a town in the hilly north of the country.

The portholes serve an educational purpose, allowing visitors to observe how this precious resource is processed.

Because the installation is part of a drinking water system, all materials had to meet potable water standards. While Hydrosight portholes are typically designed for pools and similar applications, a special frame type was developed for this project. In addition, the specification required ozone resistance, so Hydrosight had to verify that all materials used would remain unaffected by ozone exposure.

The greatest challenge, however, was the water depth. One of the windows was designed to withstand a 20-meter water column—equivalent to 20,000 kilograms of pressure per square meter. Hydrosight’s exceptionally thick yet flexible glazing was precisely engineered to meet this demanding condition.