A fire hose reel instantaneous coupling is a type of quick-connect coupling used to rapidly attach and detach fire hoses from fire hydrants, pumps or other firefighting equipment. It is designed to save time during emergencies and ensure a secure and leak-free connection.

The key features of a fire hose reel instantaneous coupling are:

1. Quick-connect mechanism: It allows firefighters to quickly and easily attach the hose to a hydrant or pump. This is crucial during firefighting operations where time is of the essence.

2. Male and female parts: The coupling consists of two parts – a male end and a female end. The male end typically attaches to the fire hose, while the female end is connected to the hydrant or pump.

3. Lug design: The coupling has lugs or hooks that allow it to be securely fastened together. When connecting, the lugs on the male end interlock with those on the female end, creating a tight and stable connection.

4. Leverage handles: Fire hose reel instantaneous couplings often have large handles or rings, which provide leverage for firefighters to rotate and tighten the coupling securely.

5. Durable and reliable: The coupling is made of sturdy materials, such as brass or aluminium, to withstand the harsh conditions faced during firefighting operations.

These couplings have become standard equipment in firefighting due to their efficiency and ease of use. Firefighters are trained to quickly and accurately connect hoses using these couplings, enabling them to deploy hoses rapidly and effectively to combat fires.