Double Jacket Fire Hose 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" fire hose offers more flow than a 1.5" diameter hose and is often used in industrial hose applications. It can be used as a supply line or a handheld line in combination with a 2" NPSH nozzle. Our 2" hose features 2" NPSH threaded couplings so can thread directly on a 2" Male NPT pipe fitting. The male hose end however can only thread into another NPSH fitting, not a female NPT.