Up Aqua’s Double Check Valve – Made of ABS plastic – Made for CO2 application – One-way valve, preventing backflow – Patented double lock screw design preventing the hose from falling off Up Aqua’s double check valve is made of ABS plastic. It is made for 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. It is equipped with a patented double lock screw design to prevent the hose from falling off.
