2. Water steadily flows from the basement to the second floor through a 0.75-in-diameter copper pipe. The volume flow rate is constant as Q = 12 gal/min (gpm). Water exits through a faucet having a diameter of 0.5 in. Consider all losses, and determine the pressure at (1) required to maintain the constant volume flow rate. If needed, use the tables below and the Moody chart on the last page. Water has a density of 1.94 slug/ft and a viscosity of 2.34 x 10-5 psf s, and the gravitational acceleration is g = 32.2 ft/s. The following conversion relations can be used: 1 ft = 12 in, 1 gal = 0.160544 ft3. KL 0.6 0.4 0.2 Q 12 gpm. (1) 0.75-in-diameter copper pipe Pipe Riveted steel Cast iron Copper Commercial steel or wrought iron A 15 ft 10 ft. (6) (4) 5 ft (3) (5) 10 ft 10 ft (7)|(8) (2) Wide open 10 ft. globe valve 0.5 in (diameter) g Threaded 90 elbows Roughness element height (ft) Roughness element height (mm) 0.003-0.03 0.00085 0.9-9.0 0.26 0.0015 0.045 0.000005 0.00015 Loss coefficients for pipe components KL Elbow, regular 90, flanged. 0.3 Tee, flanged 1.0 Faucet 2.0 Ball valve, fully open 0.05 Globe, fully open 10 Gate, fully open 0.15 Angle, fully open 2 Elbow, regular 90, threaded 1.5 1.0 0.8 0.6 0.4 0.2 M-KIV 0 0 0.2 0.4 0.6 0.8 1.0 0.2 0.4 0.6 0.8 1.0 A/A2 A/A Figure 1: Loss coefficients for sudden contraction (left) and sudden expansion (right). In the figures. A denotes the