Why are fire hydrants different colors across US cities? It’s not just for looks |
Fire hydrants, often overlooked infrastructure, are vital connections to underground water mains. In the US, climate dictates whether hydrants are ‘wet barrel’ (always full) or ‘dry barrel’ (emptied to prevent freezing). Their colours, following NFPA guidelines, instantly signal water flow capacity to firefighters, with blue indicating the highest output. Fire hydrants are placed on street…