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, . Sizing of Pump Station <br /> 1. Dctrrminc Surfacc Arca T <br /> Rectanglc=Arca=L x W W"��h <br /> x = square feet ��� �, 1 <br /> s <br /> Circle= Area=n x(Radius)� <br /> 3.14 x x = squue feet K;��;�� <br /> a=3.14 <br /> Other=Get Surface Area from Manufacturer <br /> square feet <br /> 2. Calculate Gallons Pcr lnch <br /> Thcre arc 7.5 gallons per cubic foot of volumc,thcrcforc you must multiply thc ama <br /> times the conversion factor and divide by 12 inches per fcx�t to calculate gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot <br /> �----- <br /> x 7.5+12 =�o� gallons/inch ���� �`:'��` /�"��S <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimata!Sewage Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inch(�i2) �g�� <br /> um r <br /> (�[TL+ Z )x�3 = 3Zz gallons of Type I Type II Type ll[ Typc <br /> Bedrooms !V <br /> 4. Calculate Total Pumpout Volume 2 300 225 1R0 <br /> a. To maximi2e pump life select s m sizc for 4 to 5 pump operations per day. 3 450 300 218 � <br /> �_�pd+4--�/�—fiallons per dosc 4 600 375 256 �r m� <br /> 5 750 45U Zy4 Vein� <br /> b. Calculate drainback 6 900 S25 332 <br /> �YtK�, <br /> 1. Determine total pipc length,�feek. 7 1050 600 370 �'"` <br /> 2. Detcrmine liquid volume of pipe,/.��gallons per 1(x)fctit. 8 1200 675 408 �„i;,�;,,� <br /> 3. Multi ly length b v lume: Drainback quantity= <br /> �fcet x�gallons/](H?ft._�gallons. <br /> Vi di�meta inches G�Ilunx er 100 fui <br /> c. Total pump out volume equals dose volume+drainback 1 4.4 <br /> ,��allons per dosc+_/��allons= ��_gallons 1.25 7.77 <br /> 1..5 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 /> T��x � _�gallons q ��.1 <br /> 6. Calculate Res�rve Capacity(75%the daily flow) <br /> Dail Flow(see page D-7)x.75= <br /> �O x.75=.�loZgallons <br /> Reservc Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+�allc�ns alarm+gall�ns reserve capcity <br /> �3+ #4c+#5+#6 <br /> �z z +�+�_+�_��galloiis Alarm <br /> Pump On <br /> S. Total Depth (Total gailon dividcd by gallon per inch) <br /> Tatal Gallon(�7)+gallon nch(#2) To 1 Pumpout Volumc <br /> ��+��_�inches Pump Off <br /> Pump Hcight <br /> 9. Float Scparation Distancc(cqual total pumpout volumc) <br /> Total pumpout volumc(#4c)+gallons/inch(#2) <br /> ��y_�=�inches <br /> �r,7 � C/j/�� 7J .��'il� <br /> � �� A � m��. <br /> �/� /Z �' <br />