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Sizing of Pump Station <br /> 1. Determine Surface Area T <br /> Rectangle=Area=L x W Width <br /> x = square feet Length 1 <br /> Circle=Area=n x(Radiusy <br /> 3.14 x x = square feet Radius <br /> Other=Get Surface Arca from Manufacturer <br /> it=3.14 <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 divid4j4 <br /> 12 inches per foot to calculate gallons per inch <br /> Arca x 7.5 gpft 3+12 inchs per foot /°,14,`,.)e q k'S e.e.,-5-0 z' � J Jaz4-r ) <br /> x 7.5+12 =00,gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimated Sewage Flows in Gallons per day <br /> (Height(in)+2 inc s) x gallons/inch(#2) (813d)( /0+ )x Z9 =z_tt allons Number of Type I Type II Type HI Type <br /> Bedrooms IV <br /> 4. Calculate Total Pumpout Volume 0) 225 180 <br /> a. To m cOO pump life select sump size for 4 to 5 pump operations per day. . 300 218 6°% <br /> .S gpd+4= 7.S gallons per dose 4 600 375 256 ° thc <br /> b. Calculate drainback 5 750 450 294 in <br /> 1. Determine total pipe length, 40 feet. 6 900 525 332 X1 1. <br /> 1117 <br /> 1 <br /> 7 1050 600 370 11 eer <br /> 2. Determine liquid volume of pipe,/ it per 1(X)feet. 8 1200 675 408 col l <br /> 3. Multi ly length b volume: Drainback quantity= <br /> feet x allons/100 ft.= 7 gallons. <br /> Pipe diameter(incite%) Colleens per 100 feet <br /> c. Total pump out volume equals dose volume+drainback 1 4.49 <br /> gallons per dose+ 7 gallons= �l 2 gallons 1.25 7.77 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 4E14 17.43 <br /> Depth(in)x gallons/inch(#2)_ .5 ,.:7 <br /> Z x ZO = 40 gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75%the daily flow) <br /> Dail ow(see page D-7)x.75= <br /> x.75=225 gallons <br /> 7. Calculate total gallons Reserve Capacity <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve capcity <br /> #3+# c+#5 #6 / <br /> ZOO+ 02 + 4o + ZZS=Ip ',gallons T Alann <br /> y Pump On <br /> 8. Total Depth (Total gallon divided by gallon per inch) ' <br /> Total Gallon(#7)+gallo /inch(#2) l'Toal Pumpout Volume <br /> Z7 + ZD = � inches y Pump Off <br /> Pump Height' <br /> 9. Float Separation Distance(equal total pumpout volume) <br /> Totalumpout volume(#4c)+gallons/inch(#2) <br /> �J + 2O = L// inches <br />