The Pneumatic Check Valve can prevent the aquarium from water flowing back, which is caused by the decrease, and keep the function and service life of Carbon dioxide bottle.NOTICE: Only used for carbon dioxide steel pressure vessels and cannot be used for DIY and oxygen pumps as not enough pressure to operate the valves. When used in the Ozone generator, air check valve can prevent the Ozone from flowing back to the air pump and eroding the propeller. Aquarium non return check valve can protect the power head from the water flowing back which is caused by power cut. Single check valve is easy to install, requires no additional tools and can be attached to any place you like in seconds. These Stainless Steel One Way Check Valves are suitable for CO2 supply system in fish tank, aquarium and others.
