What issue can cause liquid chlorine to flow back into its storage tank?

The issue that can cause liquid chlorine to flow back into its storage tank is a broken injection check valve. Check valves are essential components in any pressurized system that is designed to prevent backflow. In the case of liquid chlorine, if the injection check valve is compromised or not functioning properly, it will fail to create a one-way flow, allowing the chlorine to flow back into the storage tank rather than being properly injected into the system.

When the check valve is broken, there is no barrier to stop the backflow, which can lead to contamination of the storage tank with previously treated water or other substances. This risk not only raises safety concerns but can also create challenges in maintaining accurate dosing and system efficiency.

Other factors, like excessive pressure in the system, improper tank positioning, or a faulty pressure gauge, might lead to other complications in a chlorination system but would not specifically cause the liquid chlorine to return to the storage tank in the way a failed check valve would.