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6 <br /> Orono iiigh School Drawing Date:02/23/18 4/30/18 11 :20 <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 5 145 41.8 psi <br /> 1 4" Grvd Butterfly Valve Tyco BFV- 5' 120 4 . 026 145 0.0 <br /> 1 4" Thrd Back Flow Valve WATTS 774 CHART LOSS 145 2. 1 <br /> Elevation Change -11 ' 10" -5. 1 <br /> Fixed Flow Inside Hose Stream 0 gpm <br /> Hydr Ref R1 Required at. Base of Riser 145 38 .8 psi <br /> 1 Pipe 6" DIx18 America DI 350 300 ' 140 6. 338 145 0.2 <br /> Fixed Flow Outside Hose Allow. 100 gpm <br /> Hydr Ref R2 Required at City Supply 245 39.0 psi <br /> Water Source 58.7 psi static, 52.7 psi residual @ 1190 gpm 245 gpm 58.3 psi <br /> SAFETY PRESSURE 19.4 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 58.3 psi Exceeds Required Pressure of 39.0 psi <br /> This is a safety margin of 19.4 psi or 33 % of Supply <br /> Maximum Water Velocity is 14 .2 fps <br />