Hard suction hose

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Hard suction large on engine

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Strainer Storz

Hard suction end med strainer

Hard suction hose (or suction hose) is a specific type of firefighting hose used by firefighters to pump water from an unpressurized source, such as a pond, river, or pool, to a fire engine or fire truck. Unlike other hoses used in firefighting, hard suction hoses are semi-rigid, allowing them to maintain their shape when under vacuum, preventing them from collapsing under the pressure differential created by the pump. This feature makes them essential for drafting water from sources that are not under pressure.

Design and Features

Hard suction hoses are designed with durability and functionality in mind. They are typically constructed from a rigid, yet flexible material such as reinforced rubber or plastic. The interior of the hose is smooth to minimize friction loss, while the exterior is often corrugated for added flexibility and strength. These hoses are equipped with couplings at each end to connect to the pump and the water source, with one end usually featuring a strainer to prevent debris from entering the pump.

The diameter of hard suction hoses can vary, but common sizes include 2½ inches, 4 inches, and 6 inches. The length of the hose also varies, with lengths of 10 feet being common for easy handling and storage, though longer lengths are available for situations requiring greater distance from the water source.

Usage

The primary use of hard suction hoses is to draft water from sources that are not pressurized. This process involves placing one end of the hose into the water source, with a strainer attached to prevent debris and particulates from entering the hose. The other end is connected to the pump on the fire engine. Once a vacuum is created inside the hose by the pump, water is drawn up into the hose and then pumped to the fire engine, where it can be pressurized and used for firefighting operations.

Hard suction hoses are crucial in rural areas where hydrants are not readily available, or in situations where the water supply from hydrants is insufficient. They are also used in industrial settings for similar purposes.

Maintenance

Proper maintenance of hard suction hoses is vital to ensure their longevity and functionality. After use, hoses should be thoroughly cleaned to remove any debris. They should be inspected regularly for signs of wear, damage, or deterioration, such as cracks, holes, or loose couplings. Damaged hoses can significantly impair firefighting efforts and may pose safety risks to firefighters.

See Also

• Fire hose
• Firefighting equipment
• Water tender
• Fire hydrant

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