What is the maximum diameter tip permissible on a 2 1/2 inch hose line?

The maximum diameter tip permissible on a 2 1/2 inch hose line is 1 1/4 inch. This is important from a firefighting perspective because it helps to ensure that the nozzle can effectively match the flow capability of the hose while maintaining appropriate pressure and velocity. If a nozzle's diameter exceeds this recommendation, it may lead to lower pressure and inadequate reach and effectiveness of the water being discharged, which can be crucial in fire suppression operations.

A nozzle size of 1 1/4 inch allows for a good balance between flow rate and the ability to control the nozzle, providing adequate reach and penetrating ability to combat fires effectively. Choosing a nozzle that is too large or too small could hinder the fire-fighting effort or lead to operational challenges.