The cold-water faucet in a house is fed from a water main through the following simplified piping system:
a. A 160 ft length of 3/4-in.-ID copper pipe leading from the main line to the base of the faucet.
b. Six 90° standard elbows.
c. One wide-open angle valve (with no obstruction).
d. The faucet. Consider the faucet to be made up of two parts:
(1) a conventional globe valve and (2) a nozzle having a cross-sectional area of 0.10 in.².
The pressure in the main line is 60 psig (virtually independent of flow), and the velocity there is negligible. Find the maximum rate of discharge from the faucet. As a first try, assume for the pipe f_f = 0.007. Neglect changes in elevation throughout the system.