Water flows steadily through the 0.75-in.-diameter galvanized iron pipe system shown in Fig. P8.59 at a rate of \(0.020 \mathrm{cfs}\). Your boss suggests that friction losses in the straight pipe sections are negligible compared to losses in the threaded elbows and fittings of the system. Do you agree or disagree with your boss? Support your answer with appropriate calculations.

Figure P8.59

6-in. length- 90 threaded elbows -0.60-in. dia. Reducer 1-in. length 4-in. length- -Tee Closed ball valve 6-in. length Q=0.020 cfs