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Sizing of Pu>t V ,f9tation <br />1. Determine Surface Area <br />Rectangle = Area = L x W <br />x = <br />Circle = Area = x x {Radius)' <br />3.14 x x - <br />square feet <br />square feet <br />Other = Get Surface Area from Manufacturer <br />square feet <br />T <br />Width <br />1 <br />Length <br />Radius <br />n = 3.14 <br />2. Calculate Gallons Per Inch <br />There are 7.5 gallons per cubic foot of volume, therefore you must multiply the area. <br />times the conversion factor and divide by 12 inches per foot to calculate gallons per incli <br />Area x 7.5 gpft 3 + 12 inchs per foot <br />x 7.5 + 12 = gallons/inch. 3 Cry <br />3. Calculate Gallons to Cover Pump (with 2 inches of waler covering pump) <br />(Height (in) + 2 inches) x gallons/inch 02) <br />{ i- +� ) x 1= -3�(O gallons <br />4. Calculate Total Pumpout Volume <br />a. To maximize pump life select sump size for 4 to 5 pump operations per day. <br />-!L6 gpd + 4 = . , gallons per dose <br />b_. Calculate drainback <br />1. Determine total pipe length, YO, feet. <br />2. Determine liquid volume of pipe, gallons per 100 feel. <br />3. Multip,Ilength by volume! Drainback quantity = <br />feet x -M-� allons/100 ft. = jaj, gallons. <br />c. Total pump out volume equals dose volume + drainback <br />1j.gallons per dose + _ gallons = " Q- gallons <br />5. Calculate Volume for Alarm (typically 2 to 3 inches) <br />Depth (in) x gallons/inch (#2) = <br />-- - 3 x .Q-3 = 120 gallons <br />6. Calculate Reserve Capacity (75% the daily flow) <br />Daily flow (see page D-7) x .75 = <br />Y-M x .75 = .33 2 gallons <br />7. Calculate total gallons <br />gallons over pump + gallons pumpout +gallons alarm + gallons reserve capcity <br />#3 + 44 c+# 5 +# 6 <br />+=gallons <br />8. Total Depth (Total gallon divided by gallon per inch) <br />Total Gallon 07) +gallon/inch 02) <br />� + = „IJ inches <br />�. Float Separation Distance (equal total pumpout volume) <br />Total pumpout volume 040+gallons/inch (42) <br />ate+ = _V inches <br />Estimated Sewage Flows in Gallons t ;•r div <br />(8pd) <br />Number <br />of Type I T} i t 'i 1 l7c J 11 1},pc <br />11 edrooms I V <br />2 225 180 <br />3 3W 218 60Y <br />4 a (1(} 375 <br />5 750 450 <br />6 900 525 332. <br />7 1051' 600 370 <br />8 12O:� �75 408 co[uinnz <br />PI dieu+acr inches <br />Gartixu fx• <br />1.25 <br />7.77 <br />1.5 <br />10.58 <br />2 <br />17,43 <br />2.5 <br />, <br />3 <br />36. <br />66.1 <br />Reserve Capacity <br />Alan) <br />Pump oil <br />To <br />1 Pumpout Volu., �. <br />Pump Off <br />Pump Height® <br />