Frequently, sodium hypochlorite (bleach) is stored outside. For space limitations inside the building, or lack of access to fit the tank inside, the tank must be located outside.
Let’s explore the challenges and storage solutions for sodium hypochlorite tanks located outside.
Sodium Hypochlorite Outdoor Storage Challenges
Sodium hypochlorite breaks down from exposure to elevated temperatures and ultraviolet (UV) light. The temperature threshold for breakdown of bleach is typically above 90°F. The hotter the temperature, and the more prolonged the exposure to the heat, the faster the chemical will break down.
Storage Solutions to Combat Heat and UV Exposure
To address the exposure to UV light, we recommend a carbon black tank material. Carbon black blocks out UV rays and offers superior weather resistance to tank damage due to UV exposure.
But doesn’t a black tank heat up the sodium hypochlorite stored in the tank? While it’s true that the black color will get warmer than a lighter-colored tank, the polyethylene material of the tank is a poor heat conductor, meaning the sodium hypochlorite will not be as greatly affected by the outdoor heat. Additionally, at night, the tank cools significantly.
We typically don’t see a significant heat issue with carbon black tanks. However, in climates with prolonged sunlight and heat exposure, such as Arizona or Florida, painting the outside of the tank white or applying foam insulation might be prudent. Another option to prevent heat build up of the tank is an awning or lean-to covering.
For more information and to learn about sodium hypochlorite storage system technical specifications, please download the Sodium Hypochlorite Guide.
