Georg Fischer’s valve brand VAG has introduced the VAG DUOJET® @ON Smart Air Valve, a product designed to combine automated hygienic flushing with continuous network monitoring in a single device. The smart air valve for drinking water networks was unveiled as a production-ready solution at the IFAT trade fair in Munich in May 2026, addressing growing demands for hygiene compliance and operational visibility in drinking water distribution networks.
What is the VAG DUOJET® @ON Smart Air Valve?
The VAG DUOJET® @ON is a single-chamber high-performance air valve that performs three core functions: venting during pipe discharge, air release during filling, and continuous operational venting. It is capable of managing both large volumes of air during dynamic operating phases and small quantities during continuous operation, including at high air velocities.
The valve also integrates an automated flushing system and a suite of sensors for real-time network condition monitoring — functions that have traditionally required separate systems or on-site personnel.
Automated hygienic flushing and DVGW W392-2 compliance
Stagnation in drinking water networks is a known hygiene risk, particularly in dead-end sections or low-flow areas. The DUOJET® @ON addresses this through an automated flushing function that operates at user-defined intervals — for example, every three months — without requiring on-site intervention.
The system is designed to support compliance with DVGW W392-2, the German technical standard for the inspection, operation, and maintenance of drinking water distribution networks. By replacing manual flushing cycles with an automated, repeatable process, the valve aims to reduce operational workload for water network operators.
Timo Bugert, Product Manager for Global Engineering at VAG, said: “The automatic flushing system integrates seamlessly into the system and offers not only hygienic benefits but also advantages in terms of maintenance and network operation. This integration establishes a reliable foundation for consistently reliable hygiene safety throughout the entire network.”
Integrated sensor monitoring and data transmission
Beyond its physical valve functions, the DUOJET® @ON incorporates sensors that continuously measure pressure conditions and valve positions. The data gathered supports assessment of pipeline and manhole infrastructure conditions.
Network operators can receive regular status updates and real-time alerts when deviations from normal operating conditions are detected. The system can identify pressure anomalies, unusual operating states, and unauthorised access to the valve or installation shaft, transmitting this information as status or warning messages.
VAG states that data transmission is unidirectional and encrypted, with communication flowing only from field devices to the operator. External access to the valve is blocked by design, which the company says provides a high level of cybersecurity for connected infrastructure.
Low-maintenance design and network integration
The valve is designed for a minimum of three years of operation without requiring on-site service. VAG says the combination of low-maintenance operation and integrated data capability supports both compliance and the longer-term shift towards condition-based maintenance strategies.
The product is intended to integrate into existing and future network infrastructure, with potential applications extending to higher-level network analyses and predictive maintenance programmes. For further context on how digital infrastructure is being applied across drinking water networks, see H2O Global News coverage of Brabant Water’s smart network upgrade.
VAG is headquartered in Mannheim, Germany, and has manufactured metal valve solutions for the water sector since 1872. The company became part of Georg Fischer (GF) in 2025. GF, headquartered in Switzerland, employs approximately 13,300 people across 46 countries. Its Flow Solutions business reported sales of CHF 3 billion in 2025.
Further information about the VAG DUOJET® @ON Smart Air Valve is available at vag-group.com.
Frequently asked questions: VAG DUOJET® @ON Smart Air Valve
What is the VAG DUOJET® @ON Smart Air Valve?
It is a single-chamber air valve for drinking water networks that combines automated hygienic flushing with integrated sensor-based network monitoring. It was launched at IFAT Munich in May 2026 by VAG, a brand of Georg Fischer.
What does the automated flushing function do?
The automated flushing function flushes stagnation-prone sections of a drinking water network at user-defined intervals without requiring on-site personnel. It is designed to support compliance with the German drinking water standard DVGW W392-2.
What does the smart monitoring system detect?
The integrated sensors monitor pressure conditions and valve positions. The system can detect pressure deviations, unusual operating conditions, and unauthorised access to the valve or installation shaft, and transmit alerts to network operators.
How is data transmitted securely?
Data transmission is unidirectional and encrypted. Information flows only from the valve to the operator; external access to the valve is prevented by design.
What is the service interval for the valve?
The valve is designed for a minimum of three years of operation without requiring on-site service visits.
Which standard does the valve support compliance with?
The valve is designed to support compliance with DVGW W392-2, the German technical guideline for the inspection, operation, and maintenance of drinking water networks.
