As coronavirus continues to spread across the country, many facilities including college dorms, hotels, vacation condos, shopping malls, and other buildings are being shut down unexpectedly or operated with very low occupancy. As a result, building water systems that normally have hundreds or thousands of gallons of water flowing through the fixtures, piping, and equipment daily may be stagnant for an unknown period of time, maybe several months.
Stagnation can lead to serious problems that cause long-term damage, reduce property values, and be very difficult to mitigate once the building is reoccupied. What are the problems caused by water system stagnation, and what can building owners do to combat them?
Low flow and stagnation in water systems depletes disinfectant levels and stabilizes temperatures to ambient. This provides ideal conditions for biofilms to form in hot and cold water storage tanks, hot water heaters, showerheads, faucets, ice machines, swimming pools, hot tubs, decorative fountains, and cooling tower systems. Biofilms are communities of surface-attached bacteria that are directly linked to serious corrosion problems, biofouling, and the growth of Legionella and other premise plumbing pathogens. Once established, biofilms are difficult to remove from water systems even with high disinfectant levels.
Although each situation is different, there are practical steps you can take when shutting down a building to help reduce the potential for water system damage and waterborne pathogen growth:
If you have a Legionella Risk Management Plan, then many of these steps will already be defined. If you don’t, it’s recommended that you consult with a water treatment professional to advise you on specific measures you can take to reduce the potential for problems during shutdown and remedial steps to take prior to occupancy.
For additional information, support addressing these issues, or any other water management concerns, please contact your Chem Aqua Water Risk Management Services Group for immediate assistance at: 1-866-209-3373.