Mr. Aqua Airline Check Valve – Low Pressure – Requires lower pressure to open than CO2 valves – Made of ABS plastic – Normal air or CO2 application – One-way valve, preventing backflow – Standard 1/4″ barbed fittings Mr. Aqua’s check valve is made of ABS plastic. It can be used for normal air or CO2 application. The check valve is a one-way valve allowing liquid or gas to flow through it in only one direction. The purpose is to prevent backflow of liquid or gas, which can damage the pump or other equipment.
