What occurs to the DP of each line when they are the same diameter and length?

When two lines are of the same diameter and length, the discharge pressure (DP) of each line will be equal. This is based on the principle that fluid dynamics in uniform conditions leads to consistent results when all variables, such as diameter and length, are held constant.

In a fluid system, the discharge pressure is determined by factors such as the resistance to flow caused by the diameter, length, and other characteristics of the line. If both lines share identical attributes, there are no differences in resistance that would affect their respective pressures. Thus, if the conditions are truly equivalent, the result is that the DP (which reflects the pressure at which fluid can be expelled from the lines) remains equal for both lines.

This understanding is essential when analyzing systems in fire rescue operations, where ensuring adequate pressure and flow is critical for effective firefighting and emergency response.