There are a number of reasons commercial buildings are required to have backflow systems.
Protection of the potable (drinking) water supply: The primary purpose of backflow prevention devises in commercial buildings is to protect the quality and safety of the potable water supply. These devices prevent the reverse flow of potentially contaminated or non-potable water from entering the clean water supply within the building’s plumbing system.
Preventing Cross-Contamination: Commercial buildings use water for various purposes, such as cooling systems, fire sprinklers, irrigation systems, and chemical processes. Without backflow prevention devices, there is a risk that water supply, introducing contaminants, chemicals, or pollutants.
Environmental Protection: In certain commercial settings, such as industrial facilities, backflow prevention is crucial to prevent the release of chemicals or pollutants into the environment through the public water supply.
Regulation of High-Hazard Systems: Commercial buildings with high-hazard systems, such as large boilers or chemical storage tanks, may have specific regulatory requirements for backflow prevention to prevent potential harm to the public and environment.