Originally Posted by RandalatA1Sprinklers
I just went back in my books frfom the rb acedemy. we just touched on du and i had a note in my book saying they teach more about it in an auditors course.
DU= avg catch in the lowest quartile divided by the avg catch overall x 100
derived from the Coefficient of Uniformity (CU) formula
you are a pretty smart guy Kiril, where did you get all your knowledge? The auditors course is on my list of classes I want to take.
its stuff like this that makes me laugh when a homeowner thinks we just go throw pipe and heads in the ground and call it a sprinkler system.
DU doesn't necessarily have to be for the low quarter. It has been suggested the low half is a better value to use. These are the values I calculate for catch can audits with respect to DU and PR.