Hydrants supplied by which size of water mains are color-coded green?

In the context of fire hydrants and their color-coding systems, green typically indicates that the hydrants are supplied by larger water mains, specifically in the 12-inch to 16-inch diameter range. This size classification is crucial because it reflects a higher flow capacity, allowing the hydrants to provide sufficient water pressure and volume during firefighting operations. Hydrants connected to larger mains are essential for effective firefighting, particularly in urban areas where water supply needs are significant due to the density of buildings and the potential size of fires.

By contrast, hydrants linked to smaller mains may not have the same capacity, which is why they are assigned different colors in the coding system. The color-coding helps firefighters quickly assess the available water supply at a specific location, ensuring that they can strategize effectively during a fire emergency.