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 ff . 0.007. Neglect changes in elevation throughout the system.
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