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Orono High School Drawing Date:02/23/18 4/30/13 11 :19 <br /> HYDRAULIC CALCULATION DETAILS <br /> HYDRAULIC FLOW LOSS <br /> QTY DESCRIPTION LENGTH C ID gpm psi TOTALS <br /> Hydr Ref W Required at Hyd Area 6 236 54.4 psi <br /> 1 4" Grvd Butterfly Valve Tyco BFV- 5' 120 4 .026 236 0. 1 <br /> 1 4" Thrd Back Flow Valve WATTS 774 CHART LOSS 236 2.3 <br /> Elevation Change -1110" -5. 1 <br /> Fixed Flow Inside Hose Stream 0 gpm <br /> Hydr Ref R1 Required at Base of Riser 236 51. 6 psi <br /> 1 Pipe 6" DIx18 America DI 350 300' 140 6.338 236 0.4 <br /> Fixed Flow Outside Hose Allow. 250 gpm <br /> Hydr Ref R2 Required at City Supply 486 52.1 psi <br /> Water Source 58 .7 psi static, 52 .7 psi residual 8 1190 gpm 486 gpm 57 .5 psi <br /> SAFETY PRESSURE 5.4 psi <br /> NOTE: Water Source has been adjusted to include a change of elevation of <br /> 1' 6" flow test to point of connection <br /> Available Pressure of 57 .5 psi Exceeds Required Pressure of 52.1 psi <br /> This is a safety margin of 5.4 psi or 9 % of Supply <br /> Maximum Water Velocity is 20.0 fps <br />