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� <br /> ; + � <br /> ' - � Sizing of Pump Station <br /> 1. Detcrminc Surfacc Arca T <br /> Rectanglc=Arca=L x W W'��h <br /> x = square feet ���s� <br /> L <br /> Circle=Area=n x(Radius)� <br /> 3.14 x x = square feet Radius <br /> Other=Get Surface Area from Manufactumr �=3.ta <br /> square feet <br /> 2. Calculate Gallons Per Tnch <br /> Thcre am 7S gallons per cubic foot of volume,thcrrforc 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'+12 inchs per foot <br /> x 7.5+12 = ��' gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimalal Scwage Flows in Gallcros per Jay <br /> (�) <br /> (Height(in)+2 inches) x gallons/inc�(#2) um r <br /> ( lZ +�)x �r' _� G gallons of Type I Typc II Type III Typc <br /> Bcdrooms 1 V <br /> 4. Calculate Total Pumpout Volume <br /> a. To maximize pump life select sump size for 4 to 5 pump operations per day. 3 450 300 218 � <br /> r��C"iCi gpd+4= /v G� gallons pt•r dose 4 600 375 256 valua <br /> b. Calculate drainback 5 750 450 294 ;,, <br /> 6 900 525 332 �Yr��. <br /> 1. Determine total pipe length, ,:�G: feet. 7 1050 600 370 °"' <br /> 2. Detcrmine liquid volume of pipe, /�?gallons per lIX)fect. 8 1200 675 408 wi�W;,,,t <br /> 3. Multiply length by volume: Drainback quanHty= <br /> �L feet x f,�43 gallons/100 ft._ �' gallons. <br />' Pi d'umaa mchcs Callans er 100 f� <br /> c. Total pump out volume equals dose volume+drainback 1 <br /> /S^O Qallons per dose+�_gallons= /-•.��`� 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 galions/inch(#2>= 2.5 24.87 <br /> ?G; x�_= 4�; 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 /> t�/. .� x.75= =�<' gatlons <br /> Rcservc Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve capcity <br /> #3+�4 c+#5+#6 <br /> ,r' L% +!. _. Y + �c:; + �•:C =�gallons Alarm <br /> -----�— <br /> Pump On <br /> 8. Total Depth (Total gallon dividcd by gallon per inch) <br /> Total Gallon(#�+�allon/inch(#2) <br /> ��+ Z t = '�`a inches To 1 Pumpout Volumc <br /> Pump Off <br /> Pump Hcight <br /> 9. Float Scparation Distancc(equal total pumpout volumc) <br /> Total pumpout volu .(#4c)+gallons/inch(#2) <br /> /'�_ �!'"' _�inches <br />