A hypochlorinator is used to feed which of the following into a water supply?

A hypochlorinator is specifically designed to inject hypochlorite solution into a water supply as part of the disinfection process. Hypochlorite, which can be in the form of sodium hypochlorite or calcium hypochlorite, is a common disinfectant used to eliminate harmful pathogens and ensure that the water is safe for consumption. The choice of hypochlorite solution allows for precise control over the disinfection process, as it can be introduced directly into the water being treated.

When considering the other substances: chlorine gas is typically handled using a different type of chlorinator designed for gaseous form; fluoride is added for dental health benefits but is separate from chlorination systems; ozone is an alternative disinfectant but requires specialized ozone generation equipment and is not related to the function of a hypochlorinator. This specificity in function helps ensure effective water treatment processes.