What is the most common type of fire service multistage pump?

The most common type of fire service multistage pump is the two-stage pump. This design is specifically favored in fire service applications due to its ability to provide high pressure and a decent flow rate. Two-stage pumps utilize two impellers, which work together to enhance the pump's performance; the first stage increases the water's velocity and the second stage converts that velocity into pressure.

This configuration is particularly advantageous for fire service operations that often require the ability to deliver water effectively at higher pressures, such as for high-rise firefighting or when battling significant structural fires. The versatility of two-stage pumps allows them to perform well across a variety of conditions and scenarios encountered in firefighting, making them a popular choice within the fire service.

Other types of pumps such as single-stage, three-stage, and centrifugal pumps serve their specific purposes, but they do not offer the same balanced combination of high pressure and efficient flow that two-stage pumps provide, which is critical for most firefighting tasks.