Without a check valve in place, when the flow of CO2 is turned off (e.g. overnight when it's not needed) water can siphon down the tubing from your aquarium and enter your solenoid, causing it to flood, which may damage it, or require maintenance to dry out the water. This simple item eliminates that possibility by not allowing air or water to flow in the opposite direction to which it is installed.
- Protects from returning water.
- For co2/o2 use.
- Installation ensures, there is no water damage to pumps due to water blow back.
Whats in the box ?
1 x check valve