Product Dose

The hypochlorite dose will depend on the characteristics of the local water. Usually an amount in the range of 5 to 10 milliliters added to 20 liters of water is sufficient to inactivate the disease-causing organisms, but not leave an unpleasant taste. Once the size of the cap for your project has been determined, some simple experiments can be used to determine the appropriate dose. To conduct the experiments, you will need Sodium Hypochlorite , source water in your area, and a kit that measures the amount of free and combined chlorine. 

First, it is important that the concentration of the SH solution produced is correct (usually 0.5 to 1.0%). A concentration that is too low requires too high a volume to adequately treat enough water to be practical. A concentration that is too high is difficult to accurately dose, raising the risk of too high a dose (which is unpalatable), or too low a dose (which might not effectively disinfect the water). Second, it is important that the pH level of the solution be at least 11. This increases the shelf life of the solution.