What is the maximum length of 1 1/2 inch hose sections that can be preconnected to flow 125 GPM?

The maximum length of 1 1/2 inch hose that can be preconnected to effectively flow 125 gallons per minute (GPM) is based on the friction loss characteristics of the hose and the capability of the pumping apparatus.

When considering a 1 1/2 inch hose, the friction loss increases with the length of the hose. Generally, it is established that for optimal performance while maintaining a minimum pressure at the nozzle, up to 200 feet of 1 1/2 inch hose can be used to successfully deliver 125 GPM. This allows for adequate flow with minimal pressure loss, ensuring the firefighter can operate effectively.

In contrast, the other options fall short when it comes to maximizing the potential length without compromising flow rates or operational effectiveness. Therefore, choosing 200 feet allows both an effective firefighting operation and the flow rate intended.