1-1/2" Double Jacket Fire Hose Assemblies with Brass NPSH Swivel Fittings

300 PSI Double Jacket Construction with NPSH Threading for Pipe-Fed Systems

Product Overview

Standpipe systems, hose racks, and pump connections use NPT pipe thread. Standard fire department hose (NH/NST thread) will not connect to those fittings without an adapter. This double jacket fire hose solves that problem. The brass NPSH swivel coupling threads directly onto male NPT or NPSH ports, and the double jacket construction handles 300 PSI working pressure with roughly twice the abrasion resistance of a single jacket hose.

Key Features and Benefits

• Two woven all-synthetic jackets over a single-ply rubber liner. The outer jacket shields the inner jacket from abrasion, dragging damage, and surface burns, extending service life to approximately twice that of a single jacket hose at the same pressure rating.
• Brass NPSH swivel fittings (male x female) on each end. Brass resists corrosion in wet and mildly chemical environments better than aluminum fittings. The female NPSH coupling threads directly onto male NPT pipe fittings, sealing via a gasket against the square face of the male end.
• 300 PSI working pressure with 600 PSI proof test. Covers standpipe systems and industrial washdown applications that operate above the 150 PSI rating of single jacket hose.
• Available in 50-foot and 100-foot pre-assembled lengths. Each assembly ship is ready to connect. For custom fitting setups, the same hose is available as a double jacket hose without couplings.

NPSH Threading: What It Connects To (and What It Does Not)

NPSH stands for National Pipe Straight Hose. The threads have the same pitch (threads per inch) as NPT but run straight rather than tapered. NPSH couplings are sealed with a rubber gasket inside the female fitting, not by thread compression like NPT.

What NPSH connects to:

• Male NPT pipe, valves, and pump ports (female NPSH gasket seats against the male NPT face)
• Male NPSH fittings on other hose assemblies, nozzles, and adapters

What NPSH does NOT connect to:

• Female NPT pipe or couplings (male NPSH will not thread into female NPT)
• NH/NST fire department couplings (different thread profile, not interchangeable)
• Garden hose thread (GHT)

If your system uses NH/NST fittings, this hose is not compatible. NPSH threading is standard on industrial hose racks, pump connections, and pipe-fed water systems.

Applications

• Standpipe and hose rack systems. Building fire protection systems under NFPA 14 use NPT pipe connections. This NPSH fire hose threads directly onto the standpipe valve without an adapter, reducing connection time during emergencies.
• Pump suction and discharge. Connect the female NPSH swivel to a pump's male NPT discharge port for water transfer, dewatering, or fill operations. The 300 PSI rating handles standard centrifugal pump output without exceeding the hose service pressure.
• Construction site water supply. Temporary water lines on job sites run from hydrants, tanks, or pipe stubs with NPT fittings. The double jacket construction survives being dragged across concrete, gravel, and rough terrain without cutting through to the liner. Pair with a brass NPSH fog nozzle for adjustable spray at the discharge end.
• Industrial washdown. High-pressure washdown in food processing, manufacturing, and warehouse facilities. The 300 PSI fire hose handles the operating pressure of most industrial washdown systems, and the brass fittings tolerate mild cleaning chemicals.

Specifications

Choosing Between Double Jacket and Single Jacket

Both hose types use a rubber liner with woven synthetic jackets. The difference is the number of protective layers over that liner.

• Double jacket (this product): Two synthetic jackets. 300 PSI working pressure. 0.32 lb/ft. Handles repeated dragging across rough surfaces. Choose a double jacket for permanent installations, high-traffic areas, and environments where the hose contacts abrasive surfaces regularly.
• Single jacket fire hose with aluminum NPSH fittings: One synthetic jacket. 150 PSI working pressure. Lighter and more flexible. Choose a single jacket for storage cabinets, light-duty washdown, or systems that operate below 150 PSI.

The brass NPSH fire hose assembly is a modest step up from the single jacket alternative. That step buys double the pressure rating and significantly longer service life in abrasive conditions.

Buy Double Jacket Fire Hose Online from Cleanflow

Cleanflow Utility Supply Company is an authorized distributor. Double jacket fire hose assemblies for sale in Canada and the USA. Free shipping applies to most orders over $199.

This double jacket fire hose assembly ships with brass NPSH swivel fittings installed. Confirm that your system uses NPSH or NPT male connections before ordering. For NH/NST fire department applications, a different hose assembly is required.

See our full hose and fittings selection for compatible options. Returns accepted within 30 days.