How do you figure friction losses in PE pipe bends? I have a found a few references to fittings with friction coefficients for actual fittings such as a 90 degree bend with a fitting, but can't find anything about friction in bends. We are planning to curve the actual pipe and not use fittings. A couple of the curves will be 90 degrees with the min. radius of about 8 feet for a 4" pipe.
Would could use an equivalent pipe length for say a 90 degree bend, but this seems like it would be overkill.
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