What is a requirement for the tank-to-pump line in an MWS apparatus?

The requirement for the tank-to-pump line in a Mobile Water Supply (MWS) apparatus is that it must be capable of supplying 500 gallons per minute (gpm) until the tank is 80% empty. This specification ensures that the system can provide an adequate and consistent flow of water to support firefighting operations effectively, particularly in high-demand scenarios.

The requirement to maintain a flow of 500 gpm is crucial for maintaining pressure and ensuring that enough water is available for effective firefighting, especially when dealing with larger fires. The stipulation that this flow rate must be maintained until the tank is 80% empty serves to guarantee that sufficient water is accessible during critical early stages of firefighting efforts, when rapid suppression is often essential.

This requirement highlights the importance of having robust infrastructure to support fire suppression efforts, ensuring that fire departments can adequately respond to emergencies with the resources necessary to combat large fires efficiently.