Fire truck pump sizes can vary depending on the specific make and model of the truck. However, there are generally two main types of pumps found on fire trucks:

Positive Displacement Pumps (also known as “piston pumps”) – These pumps are typically used for high-pressure applications and are capable of delivering a constant flow rate. They can range in size from 500 to 2000 gallons per minute (gpm).

Centrifugal Pumps – These pumps are typically used for high-volume applications and are capable of delivering a variable flow rate. They can range in size from 500 to 5000 gpm.

It’s important to note that the pump size is not the only factor in determining a fire truck’s firefighting capabilities. Other factors, such as the water tank capacity, hose diameter, and nozzle selection, also play a significant role in a truck’s ability to extinguish fires.

There are several common fire pump sizes that are often found on fire trucks:

• 500 gallons per minute (GPM)
• 750 GPM
• 1,000 GPM1,250 GPM
• 1,500 GPM
• 2000 GPM

The size of the fire pump needed for a specific fire truck will depend on several factors, including the size and type of the fire truck, the intended use of the fire truck, and the water supply available. It is important to select a fire pump that is appropriately sized for the intended use to ensure that it can effectively deliver water to the fire.