CO2 is a gas with special characteristics and it has totally different physical properties from air.
For this reason, DENNERLE has developed a special check valve for CO2 systems.
At its core, there is a permanently elastic, CO2 resistant special membrane.
It is mounted to sealing strips under tension.
2 hose screw connections provide a CO2 tight connection.
The CO2 Special Check Valve should be mounted as closely to the pressure reducer or the CO2 night switch-off as possible. Then it is easier to adjust the number of bubbles per minute, as you can easily see the result of the adjustments to the needle valve in the bubble counter, and you can also see when the CO2 night switch-off is closed.