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- - <br /> Sizing of Pump Station <br /> 1. Determine Surface Area T <br /> • width <br /> Rectangle=Area=L x W. 1 <br /> x = square feet .. Length <br /> Circle=Area=n x(Radius): <br /> 3.14 x x = square feet <br /> Radius <br /> Other=Get Surface Area from Manufacturer n=3.14 / <br /> • .31_ 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 times the <br /> conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> rSa x 7.5+12 <br /> S L x 7.5+12 = 2- 0 gallons/inch • <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimated Sewage Rows in C.1..1:1(41%per day <br /> (Height(in)+2 inches) x gall ns/'nch <br /> Number <br /> ( t0 + 2- )x 2-b 3=-4)T bgallons of type 1 Type u1 Tape f .1.!•Pe <br /> Bedrooms <br /> 4. Calculate Total Pumpout Volume i ,'so 225 218 66.4 <br /> A. To maximize <br /> pumplife select um size for 4 to 5 pumpoperations 1�r day. 4 boo 3751 256 yu <br /> • s '� sis �'ibCgpd+41 TO Sump <br /> sper dose 900 <br /> T�r. <br /> B. Calculate drainback s 12000 � 40S <br /> a. Determine total pipe length,10 b feet. <br /> b. Determine liquid volume of pipe, I( gallons per 100 feet. (see page F-13) rwa r arws,rn W <br /> c. Multiply length by volume: Drainback quantity= 4.49 <br /> 100 feet x b gallons+100 ft.= 1 L gallons. 1.5 10.5S <br /> 1743 <br /> C. Total pump out volume equals dose volume+drainpack 2.5 24.157 <br /> I t So gallons per dose+ t to ,gallons= I b (• Total gallons 3 's <br /> i a c,r, <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) <br /> Depth(in)xgallons/inch= <br /> (j v Reserve Capacity <br /> X _ ,bb gallons <br /> 6. Calculate Reserve Capacity(75%the daily flow) y Alum <br /> Daily flow(see page D-7)x 75 s y Pump On <br /> 6b0 ,x.75= 0gallons <br /> Thal Pumpout Volume <br /> 7. Calculate total gallons y Pump Off v <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve Pump Height <br /> 3+4+5+6 <br /> 2'10 + 166 + + ticb = 914., gallons <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Total Gallon+gallon/inch <br /> 4.11‘4 + 2 e = N,(4 inches <br /> 9. Float Separation Distance(equal total pumpout volume) <br /> Tptal pArnpout volume+gallons/inch <br /> bO +114 - 7 inches <br /> • <br /> • <br />