A very high-quality German CO2 check valve for freshwater or marine applications. A mid-level & mid-priced, quality check valve between the Metallic and the Plastic units. Takes 4/6 mm (ID/OD) or 1/8" airline tubing.
CO2 is a special gas which has quite different physical properties to air. DENNERLE has thus developed a special check valve for operation with CO2. The core element is a special permanently elastic, CO2-proof membrane.
It is fitted under tension, in firm contact with sealing rims.
2 hose connectors with screw fittings ensure CO2-proof connection.