ZRDR | Aquarium CO2 Stainless Steel Check Valve Is Used in the Diffuser of CO2 Equipment to Prevent Gas Backflow Hose Inner Diameter 4m

 Product specifications:Item: CO2 check valveMaterial: Stainless steelInlet/outlet pipe diameter: 4mm in diameterNote: Only applicable to CO2 systems! Please do not use this CO2 check valve with an air pump air compressor. The carbon dioxide check valve is only suitable for carbon dioxide equipment-oxygen cylindersIt can only be used for high-pressure vessels, such as CO2 gas cylinders.Do not use DIY and air pumps. They cannot be used due to insufficient pressure.