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F-22 <br /> Sizing of Pump Station <br /> T <br /> 1. Determine Surface Area Width <br /> Rectangle=Area=L x W 1 <br /> x = square feet Length <br /> Circle=Area=n x(Radius)2 <br /> 3.14 x x = square feet <br /> Radius <br /> Other=Get Surface Area from Manufacturer n=3.14 <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 times the <br /> conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Area x 7.5+12 -0.111-iycirt n <br /> x 7.5+12 = gallons/inch � �,N.,/C _ (o cio cJ au <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimated Sewage Flow in Gallons per Day(gpd) <br /> (Height(in)+2 inches) x gallons/inch N o tee 1c I 1)13e u Type III Type IV <br /> ( /0 + 2 )x 2-3 = L7 to gallons Bedrooms <br /> 2 �sxi\ 225 180 60% <br /> d <br /> 4. Calculate Total Pumpout Volume 4' �600� 3007 218 „tt, <br /> A. To maximize pump life select sump size for 4 to 5 pump operations per day. 6 7750 In <br /> 90 450 2234 <br /> `(So gpd+4 = // 3 gallons per dose7 1050 600 370 <br /> B. Calculate drainback 8 1200 675 408 t <br /> a. Determine total pipe length,2-C feet. <br /> b. Determine liquid volume of pipe,/7.1 gallons per 100 feet. (see page F-13) rt.....0..., 9.47g.. <br /> c. Multiply length by volume: Drainback quantity= 1.25 7.77 <br /> 75 feet x 17,4 gallons+100 ft.= /3 gallons. 2 1 > <br /> C. Total pump out volume equals dose volume+drainback J 24.87 <br /> /1 gallons per dose+ ,/Jgallons= /2 G Total gallons a 68 <br /> .1 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) <br /> Depth(in)x gallons/inch= 7 Reserve Capacity <br /> x_Z_a= G Y gallons — <br /> \ Sa9 e h, ..23 /, <br /> 6. Calculate Reserve Capacity(p5%the daily flow) T Alarm <br /> Daffy flow(see page D-7)x.75= 3 4 7 Pump On _. (a 9 T ,,Q <br /> . <br /> . S O x/,y L/5 gallons _1 - <br /> 5 �. <br /> 5 /2G 7 al To.al Pumpout Volume <br /> 7. Calculate total gallons ---- y Pump Off v <br /> gallons over pump+gallons pumpout+gallons alarm+gallons reserve Pump <br /> xeightL /� (, <br /> 3+4+5+6276� <br /> Z7( + r 2,C) + 67 + 'S0 =CCTT7�/ gallons tl� <br /> n9. 4..{{'' <br /> 0 <br /> `i--- <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Total Gallon+gallon/inch <br /> /Gao + 23 =`/3. 3 inches —�, <br /> 9. Float Separation Distance(equal total pumpout volume) <br /> Total pumpout volume-+gallons/inch <br /> /2 Co + 23 = g-5- inches <br />