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Sizing of Pump Station <br /> 1. Determine Surface Arca T <br /> Rectangle=Arca= L x W X94/ Width <br /> L <br /> x = square feet — Length — <br /> Circle= Arca=It x(Radius)2 <br /> 3.14 x x = square feet Radius <br /> it=3.14 <br /> Other=Get Surface Area from Manufacturer <br /> square feet <br /> 2. Calculate Gallons Per Inch <br /> There are 7.5 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 Q <br /> x 7.5+12 = 20 gallons/inch <br /> .Vd//z /04,4;...,e A KS <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimated Sewage Flows in Gallons per day <br /> (BPd) <br /> (Height(in)+2 inches) x gallons/inch(#2) <br /> Number <br /> ( /0 + Z )x ZO = Zqo gallons of Type I Type II Type III Type <br /> Bedrooms I V <br /> 4. Calculate Total Pumpout Volume 2 300 225 180 <br /> a. To maximize pump life select sump size for 4 to 5 pump operations per day. 3 300 218 <br /> 6,00 gpd+4 = 45-"0 gallons per dose 375 256 v it <br /> b. Calculate drainback 5 750 450 294 ;� <br /> 6 900 525 332 1Yrx I. <br /> 1. Determine total pipe length, 20 feet. 7 1050 600 370 1117'2. Determine liquid volume of pipe, /7r gallons per 1(X)feet. 8 1200 675 408 column. <br /> 3. Multi ly length by vo ume: Drainbac quantity= <br /> feet x /7. gallons/100 ft. = 5 gallons. <br /> CrIMMIMI callous r 100 r«i <br /> c. Total pump out volume equals dose volume+drainback 1 . 4 lk <br /> /4(o gallons per dose+ S gallons= /mss gallons 1.25 7.77 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) AP 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.5 '.:7 <br /> Z O x 2 = 40 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 /> (poo x.75= 45-4"gallons <br /> y Reserve Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve capcity <br /> #3+ #4 c+# 5+#6 <br /> Z40 + /.SSS + 40 + 40= 88.5-gallons y Alarm <br /> y Pump On <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Total Gallon (#7)+gallon/inch(#2) <br /> 8g,s+ 2 = 44. inches 1ToilPurnpoutVulumc <br /> y Pump Off <br /> Pump Height& <br /> 9. Float Separation Distance(equal total pumpout volume) <br /> Total pumpout volume(#4c)+gallons/inch (#2) <br /> 4.<S-+ ZO = 7 A inches <br />