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Supply line, supply hose, large-diameter hose fire hose, usually larger than 2.5 inches (64 mm) in diameter, used to transport water from one source to another, such as from a hydrant to a fire engine or from one engine to another. In the US a 5" diameter hose is common.
5-inch (13 cm) flex suction hose with Storz fittings, mounted on an engine. Flexible suction hose (Flex suction or suction hose), not to be confused with hard suction hose in U.S., is a specific type of fire hose used in drafting operations, when a fire engine uses a vacuum to draw water from a portable water tank, pool, or other static water source.
Storz size Lug diameter, inner face (mm) Hose diameter, internal (mm) Standard Fire-fighting usage 25 37 25 AS2419.4 Australia 32 44 32 38 52
Hoses up to 12 in (30.5 cm) in diameter with pressure ratings up to 150 psi (10.3 bar; 1,030 kPa) are now available. These hoses are expected to find applications in large-scale industrial firefighting, as well as in disaster relief efforts and military operations. [17] Fire hoses come in a variety of diameters.
A typical US dry-barrel hydrant has two smaller outlets and one larger outlet. The larger outlet is often a Storz connection if the local fire department has standardized on hose using Storz fittings for large diameter supply line. The larger outlet is known as a "steamer" connection, because they were once used to supply steam powered water ...
This standard specified that each fire hydrant have one large diameter pumper (a.k.a. "steamer") port 4.5 inches in diameter with 4 threads per inch (meant for supplying water to a pumper truck or other high-capacity distribution device), and two medium-diameter ports, each 2.5 inches with 7.5 threads per inch, meant for supplying individual ...
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