Sealing Water Ingress at Hoch-Behälter Reservoir – Usingen, Germany

Chronic Leakage in Potable Water Infrastructure

The Hoch-Behälter is a critical potable water reservoir supplying the Usingen region in Hesse, Germany. Over time, persistent leaks developed in:

• Construction joints between the reservoir walls and floor slab,
• Microcracks formed due to settlement and thermal cycles,
• Interfaces between old concrete and rehabilitation sections.

This led to:

• Uncontrolled water loss, reducing storage capacity,
• Risk of contamination from surrounding groundwater,
• Moisture-related degradation of reinforcement,
• Regulatory compliance issues for drinking water safety.

Due to the reservoir’s essential role, a non-toxic, non-invasive repair solution was required without emptying or replacing the structure.

EURAS® Gel Type B – Safe Sealing for Drinking Water Facilities

After technical analysis, EURAS® Gel Type B was selected for its:

• Proven hydroscopic properties to displace and stop active leaks,
• Elasticity to handle settlement and temperature-induced movement,
• Deep penetration into fine cracks via high-pressure injection,

The work was performed during scheduled maintenance windows to avoid service interruption:

1. Mapping leak paths and microcracks with moisture detection tools,
2. Drilling of targeted injection ports in critical joint interfaces,
3. High-pressure injection of EURAS Gel Type B up to 140 bar,
4. Monitoring gel flow and return pressure to ensure complete filling,

• sealing of all active leaks,
• Restoration of full reservoir capacity,
• Protection of concrete structures and reinforcement from moisture damage,
• No need for excavation or replacement.