Water treatment station VIESSMANN AquaStilla 25 Smart (S) – compact residential water conditioning unit

VIESSMANN AquaStilla 25 Smart (S) is a compact residential water conditioning unit designed to provide centralized water treatment for single-family homes and small properties. The station integrates filtration and water quality management components into a single housing, simplifying installation and day-to-day operation. Designed for indoor installation near the main water inlet, the unit delivers treated potable water to household systems while maintaining a reduced footprint compared with separate components.

Advantages

The AquaStilla 25 Smart (S) combines mechanical filtration and water conditioning in a compact assembly to reduce installation complexity and save space. Built for routine residential requirements, it supports consistent water quality through integrated controls and service access points that facilitate maintenance. The product's compact dimensions and modular connections make it compatible with standard domestic plumbing layouts, and the enclosed design helps protect internal components from dust and accidental damage.

Suitable for

• Single-family homes and small residential properties
• Primary domestic water supply line treatment
• Pre-treatment before point-of-use devices such as water heaters and kitchen taps
• Renovation projects where space-saving water conditioning equipment is required

Key specifications

• Compact cabinet-style housing suitable for indoor installation
• Integrated filtration stages for removal of particulates and conditioning media
• Connections compatible with standard residential plumbing
• Service access for filter replacement and routine maintenance
• Designed to provide potable water quality for a single dwelling

How to use

Install the AquaStilla 25 Smart (S) near the main water inlet in a frost‑protected interior space and connect to the household plumbing according to local regulations and installation guidelines. Commission the unit following the manufacturer's instructions, including flushing and any required media activation procedures. Regularly inspect service indicators and perform scheduled maintenance such as filter cartridge replacement and media renewal to preserve treatment performance. If a pressure regulator or bypass is present, set it as instructed to ensure correct operating pressures.

Usage recommendations

Follow local water quality regulations and the manufacturer's service intervals. Use qualified plumbers for installation and maintenance, and keep a record of filter changes and servicing to ensure continuous potable water performance.