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Sizing of Pump Station <br /> 1. Determine Surface Arca T <br /> Rectangle=Area=L x W Width <br /> x = square feet l <br /> Length <br /> Circle= Arca=>t x(Radius)2 <br /> 3.14 x x - quare feet Radius <br /> Other=Get Surface Arca from Manufacturer x3'1d <br /> square feet <br /> 2. Calculate Gallons Per Inch <br /> There arc 7.5 gallons per cubic foot of volume, therefore you must multiply the arca <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Arca x 7.5 gpft 3+12 inchs per foot <br /> x 7.5+12 = gallcns/inch <br /> Estimated Sewage Flows in Gallons per day <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) (dam) <br /> (Height(in)+2 inches) x gallons/inch(#2) <br /> ( + )x = gallons Nof�r T 1 T II III <br /> Type Type Type Type <br /> Bedrooms 1 V <br /> 4. Calculate Total Pumpout Volume <br /> 225 10 <br /> a. To maximize pump life select sump size for 4 to 5 pump operations per day. 3 300 300 218 406 <br /> "It C) gpd+4= I I gallons per dose 4 600 375 256 el she <br /> values <br /> b. Calculate drainback 5 750 450 294 tot <br /> 6 900 525 332 It. <br /> 1. Determine total pipe length, c) felt. 7 1050 600 370 °' <br /> 2. Determine liquid volume of pipe, 1 ,' gallons per 1(X)feet.0 • 8 1200 675 408 ODIUM/ <br /> 3. Multiply length by volume: Drainback quantity <br /> c .feet x 14 gallons/100 ft. = I'4 gallons. <br /> Pips dimmer(Inches) Gator nw 100 rad <br /> c. Total pump out volume equals dose volume+drainback 1 4.49 <br /> ID._ gallons per dose+ 14 gallons= I cc gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 2 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.5 24.87 <br /> x = gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75% the daily flow) <br /> Daily flow(sec page D-7)x.75= <br /> x.75= gallons <br /> 7. Calculate total gallons T Reserve Capacity <br /> gallons over pump+gallons pumpout+gallons alarm +gallons reserve capcity <br /> #3+ #4c+#5+#6 <br /> + + + = gallons 7 Alarm <br /> Pump On <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Total Gallon(#7)+gallon/inch(#2) 7b al Punipout%blume <br /> + inches <br /> y Pump Off T <br /> Pump Height' <br /> 9. Float Separation Distance(equal total pumpout volume) <br /> Total pumpout volume(#4c)+gallons/inch(#2) <br /> + s inches • <br />