The figure shows the project of the pipe system for fire fighting in an industrial facility. In points 1, 2, 3 and 4 it is required to install hydrants to supply costs of 15, 30.60 and 15 It/sec. Respectively. Determine the cost in the tubes of the system. (Use the HazenWilliams formula, 95.) CH considering that the elevation of all knots is 70.00 m. Calculate the height of the pressure loads, at each knot. D-300 mm L-200 m 15 It'seg. D=250 mm L800 m 15 Iseg. D-250 mm L-200 m 2 30 It'seg. D=250 mm. L-800 m 60 It'seg.