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• �izing oE Pum� Station <br /> 1. Dctcrminc Surfacc Arca T <br /> Rcctanglc=Arca =L x W widih • <br /> x = square feet 1 <br /> Lcngth <br /> Circle= Area =n x(Radius)2 <br /> 3.14 x x = square feet Radius <br /> Other=Get Surface Area from Manufacturer n=3.ta <br /> ' �'� square feet <br /> 2. Calculate Gallons Per inch <br /> Thcre arc 7.5 gallons per cubic foot of volumc,thcrcforc 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'+12 inchs per foot `", <br /> I , ...I�` , .. <br /> - x 7.5+12 = gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimata!Scwagc Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inch(#2) �g�� <br /> �.1! '_+ �'• )x ==<':> _..:'`��� gallons um r <br /> of Type I Typc II Typc TII Typc <br /> I3cdrooms �y <br /> 4. Calculate Total Pumpout Volume 2 3p0 225 180 <br /> a. To maximize pump life select sump size for 4 to 5 pump operatioits per day. 3 450 30Q 218 � <br /> `,�-- gpd+4 = !! �, galions per dose 4 600 375 256 °r�"� <br /> b. Calculate drainback ' S 750 450 294 "';�� <br /> ]. Determine totai pipe length, +;,: feet.� 6 900 525 332 �Yr��. <br /> 2. Determine li uid volume of i ' � 7 1050 6W 370 ���`�' <br /> q p ��=-�=�_�jallons per 100 fc.�ct. 8 �2� b�s 4�g colwnns <br /> 3. Multiply lcngth by volume: Draiiiback quantity= <br /> fcet x ��•t�-gallons/]00 ft._ /ri galitms. <br /> Pi diame�er inches C�Il�nx er 100(ut <br /> c. Total pump out volume equals dose voluine+drainback 1 4.4 <br /> ,! . eallons per dosc+ �' �=� �illons= �'s'' =`} gallons 1.25 7.77 <br /> 1.S 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 2 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.S 24,87 <br /> �'�'�` x �'� _ � �- 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 /> "' ..���-:-, x.75= �'" t�_gallons <br /> 7. Calculate total gallons Rcservc Capacity <br /> gallons over p.ump+gallons pumpout+fiallc�ns alarm +gallons reserve capcity <br /> �3+ #4c+#5+#6 �; ;�, <br /> �'/':; + <<: R' +�'��% + ,:,:; = i `, ; gallons Alarm <br /> Pump On <br /> 8. Tatal Depth (Total�allon dividcd by�allon per inch) <br /> Total Gallon(#i i)+�allon/inch(#;2) <br /> �� �'� + ' ' _ ^''if incl�es I To 1 Pumpout�olumc <br /> Pump OfF <br /> Pump Hcight <br /> 9. F7oat Separation Distance(equal total pumpout�-olume) <br /> Total pumpout volume(#4c)+gallons/inch(#2) <br /> i�'� + Z ^ _.�_inches <br />