MiOYOOW CO2 Check Valve, Aquarium Needle Valve Anti Backflow Non Return for System Diffuser

Function: The input air is circulated from a direction, and the air input from the opposite direction is not circulated, which can ensure that the pressure on the output side does not change Non-return Design: Prevent gas or liquid backflow when pressure changes, prevent CO2 equipment damage. Good sealing and no leakage Features: The air co2 line tubing regulator protect the power head from the water flowing back which is caused by power cut. Wide Applciation: Suitable for trachea with inner diameter of 4mm and outer diameter of 6mm, acrylic tube of CO2 refiner. After-Sale Service: Thanks for your purchase. If you have any problem , please feel free to contact us any time. We promise you the satisfying solutions within 24 hours.