Double Jacket Fire Hose 2 1/2" USA Made fire hose is manufactured to NFPA 1961 specs and is suitable for water pressures up to 400 psi. The mill hose option is rated to 150 psi and is not intended for firefighting. 2.5" fire hose is typically used as a supply line. While it can be used with a 2.5" nozzle, it is quite heavy when charged with water, and would be difficult to handle for most users. The larger diameter allows for low friction loss making it an excellent option to use early in a long hose run to maintain maximum water pressure, before adapting down to 1.5" or 1.75" fire hose for the nozzle. The double jacket hose category is our most durable hose and fire hose with color treatment offers the absolute maximum durability. We only offer 2 1/2" fire hose with NH aka NST threaded couplings.