If you crawl under the fire engine and look around, you'll have a hard time figuring out how everything works. The inner operations of a Fire Engine's Pump & Plumbing is almost entirely hidden and can be very difficult to understand, especially for a new fire engine operator.
Open the pump and plumbing diagram (left) to walk through some of the more frequently used Fire Engine operations:
Providing adequate water is not only a fire engine operator's Job, but, it is also essential for the safety and effectiveness of your crew. Pump Discharge Pressure (PDP) is the pressure required at the pump to compensate for changes in elevation and friction loss in a hose lay. Given a hose lay, like the simple example pictured to the right, you need to be able to determine PDP to ensure the nozzle furthest away from the engine has adequate pressure. At the same time, you have to take into consideration the PSI (Pounds per Square Inch) in each section of hose (compared to max hose pressure) and be able to overcome limitations in or lack of proper equipment. Once in a while (especially on very long hoselays) you will need to overcome multiple obstacles (significant elevation change, high flow requirements, or excessive distance).
When it comes down to solving a problem in an emergency situation, you need to know exactly what you are doing and be able to do it quickly. Our PDP instructions will help you learn the big picture and it will also help you perform quick and accurate calculations in the field.
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