Single vs double jacket fire hose: construction, uses and how to choose

Lay a single jacket and a double jacket fire hose of the same bore side by side and the difference is easy to see: the double jacket hose is thicker, heavier and stiffer. Cut one open and the reason is obvious — under the outer woven jacket sits a second complete jacket, and only then the liner. Whether that second layer is worth carrying depends on who uses the hose, how often, and over what.

/01How they are built.

In both types the liner — EPDM, natural rubber or polyurethane — seals the water in, and woven polyester carries the pressure. A single jacket hose has one woven jacket over the liner; some are coated on the outside for abrasion and to stop the jacket soaking up water. A double jacket hose has two, one inside the other. The outer jacket takes the scuffing on concrete and gravel and protects the inner one; if the outer jacket is cut or burned through, the inner jacket keeps the hose in service. Our guide to fire hose liner materials covers what sits inside.

/02How the standards classify hose.

Standards classify fire hose by use and performance, not by jacket count. In North America, NFPA 1961 — consolidated in 2024 into NFPA 1960 — covers attack hose for trained firefighters, occupant-use hose on standpipes for untrained occupants, forestry hose for wildland fires and large-diameter supply hose from the water source to the apparatus. Hose is marked with its service test pressure; the factory proof test is twice that. NFPA 1962 sets the in-service tests: at least 300 psi for attack and forestry hose and 200 psi for supply hose, or the marked service test pressure.

In Europe, EN 14540 covers non-percolating lay flat hose for fixed systems — 25 to 52 mm bore, up to 15 bar — the hose used in EN 671-2 wall-mounted hose systems for occupants. In the UK, BS 6391 covers non-percolating lay flat delivery hose for firefighting, also to 15 bar. In the GCC, the rules are set by civil defence: the UAE Fire and Life Safety Code requires double-jacket, synthetic-fibre reinforced hose on Class I standpipes and dry risers — the 65 mm outlets used by Civil Defence — while occupant hose racks carry 40 mm hose. See fire hose requirements in the UAE.

/03Which one, where.

In practice most industrial sites in the Gulf use both: double jacket EPDM-lined hose on the fire water ring main and with the site fire team, and single jacket cabinet hose in buildings. For long storage in hot plant rooms, the liner matters as much as the jacket; for frequent dragging, the jacket matters most. Couplings are a separate choice — expansion ring couplings in NST, NPSH or BAT threads, or instantaneous and Storz patterns to match the hydrants and appliances on site.