The spray wand at a car wash shown in Figure P13.9 has a 1/4 in. exit nozzle and requires 100 ft/s exit velocity. The piping system from the pump consists of 50 ft of 1 in. commercial steel pipe with three standard elbows, one open gate valve, 15 ft of rubber tubing, and 4 ft of 1/2 in. commercial steel, which makes up the wand. The pump is located about 6 ft below the exit of the wand. What pressure is required to drive water at 70°F through the spray wand?