Main function: it can prevent the backflow of the aquarium due to the reduction and maintain the function and service life of the carbon dioxide bottle. High quality materials: The check valve is made of stainless steel, which does not necessarily rust in water and has a long service life. Scope of application: Suitable for carbon dioxide supply systems in aquariums, fish tanks, etc. Other applications: The check valve can prevent the aquarium from backflowing water, which is caused by the decrease, and retain the function and service life of the carbon dioxide bottle. Product Features: 1: This product is made of non-embroidered special steel and processed by high CNC grinding. 2: Prevent the water plant tank from reducing carbon dioxide pressure and causing reverse flow affecting the operation and life of the carbon dioxide bottle. 3: Protect the pump motor to ensure that the water will not flow back and corrode the carbon dioxide cylinder due to power failure It can only be used for
