What types of chemicals are used in the tower?

• A. Bleach
• B. Ammonia
• C. Hydrochloric acid
• D. Sodium hydroxide

Answer: (A)

Cleaning and sanitizing tower equipment relies on a chemical that effectively kills microbes and removes buildup without harming the tower materials. Bleach, or sodium hypochlorite, fits this role well because it provides strong disinfection and is commonly used to sanitize water circuits inside towers when applied at the proper concentration. It’s generally safer for routine cleaning of interior surfaces than the other options, which are more hazardous or reactive in a tower environment—ammonia can release harmful fumes, hydrochloric acid is highly corrosive and can damage equipment, and sodium hydroxide is caustic and can attack gaskets and materials. So, bleach is the best choice for maintaining cleanliness and preventing microbial growth in the tower.