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Sizing of Pump Station <br /> 1. Determine Surface Area <br /> T <br /> Rectangle=Area=L x W Width <br /> x = square feet 1 <br /> Length <br /> Circle=Area=x x(Radius)' <br /> 3.14 x x = square feet Radius <br /> Other=Get Surface Area from Manufacturer "-3'14 <br /> square feet <br /> 2. Calculate Gallons Per inch <br /> There are 73 gallons per cubic foot of volume,therefore you must multiply the area <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Area x 7.5 gpft 3+12 inchs per foot <br /> x7.5+12 = Z0 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 inches) x gallons/inch(#2) <br /> Number <br /> +�)x O = gallons of Type I Tnx 11 Type 11I Tylx <br /> BedroomsI V <br /> 4. Calculate Total Pumpout Volume 225 180 <br /> a. To max,ij��rz�ump life select 60%um size for 4 to 5 pump operations per day. 3 50 300 218 <br /> gpd gallons per dose 375 256 of w° <br /> b. Calculate drainback � 5 750 450 294 Valuesn <br /> 1. Determine total pipe length,�f tt 7 1050 600 370 525 332 711 or <br /> l <br /> 2. Determine liquid volume of pipe,��cjk allons per 1(X)feet. 8 1200 675 408 col ns <br /> 3. Multiply length b vol me: Drainba qui tity= <br /> c.'v feet x��allons/100 ft.=-gallons. <br /> Pipe diameter inches Gdlons Per 100 feel <br /> C. Total pump olume equals dose vol +drainback 4.49 <br /> /,;gallons per dose+ _gallons= �Z Z gallons 1.25 7.77 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 17,4 <br /> Depth(in)x allons/inch #2)= 2.5 - <br /> pg IT87 <br /> zo xZ = gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75%the daily flow) <br /> Daily flow(see page D-7)x.75= <br /> �Qx.75=gallons <br /> Reserve Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve capcity <br /> #3+#4 c+#5+#6 p <br /> z�+/z2 +4O _+337 =ZSgallons Y Alarm <br /> i <br /> 8. Total Depth (Total gallon divided by gallon per inch) Pump On <br /> Total Gal on 07)+gallo /inch(#2) Er <br /> 1 Pumpout Volume <br /> 7.� + Z0 =�inches <br /> Pump Off <br /> 9. Float Separation Distance(equal total pumpout volume) Pump Height <br /> Totapout volum (#4c)+gallons/inch(#2) <br /> � + 20 = inches <br />