One of the problems with the aging infrastructures in today's communities is the build up of restrictive corrosion inside iron water pipes. Known as tuberculation, (think tuberculosis) this corrosion build up can severely impact the flow through a water main. When occurring in residential areas, this restrictive flow may not be discovered until the FD needs to flow hundreds of gallons a minute to fight a structure fire. Therefore, best practice has the FD working closely with the water authority to ensure adequate fire flow availability throughout the community. The two agencies must work as partners, not adversaries.