When calculating friction loss in a sprinkler system, it is generally accepted that a 90° standard elbow of 2 in. (50 mm) in diameter is the equivalent of:
When calculating friction loss in a sprinkler system, it is generally accepted that a 90° standard elbow of 2 in. (50 mm) in diameter is the equivalent of:
When calculating friction loss in a sprinkler system, a 90° standard elbow of 2 inches (50 mm) in diameter is generally accepted to be equivalent to 5 feet (1.5 meters) of pipe. This equivalency is used to account for the additional resistance to water flow caused by the change in direction within the elbow fitting.
ANS: C. FPH 15-57
Correct Answer is C: 5 feet of pipe (1.5 m), refer to the Section 15, chapter 3 , page 15-57