Double Jacket Fire Hose 1 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. The 1.5" fire hose is the most common diameter attack hose as it offers excellent water flow but is not too heavy to handle for most users. This size and flow combination is outstanding for both fire department use and various commercial / industrial hose washdown applications. The double jacket hose category is our most durable hose and fire hose with color treatment offers the absolute maximum durability. Please select the correct thread type (NH aka NST or NPSH) for your connection.