The Stefani 20mm Dual Check Valve is designed to prevent cross contamination of non-potable water into safe drinking water. The two spring loaded check valves remain tightly closed until there is a demand for water downstream. In the event that there is reverse of flow direction, the check valves will close and back-flow is prevented.
The Stefani 20mm Dual check valve provides protection in low hazard applications, like meter connections on domestic properties.
Approved to AS 2845-1 Standards.
