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Sizing of Pump Station <br /> 1. Determine Surface Arca T <br /> Rectangle=Area= L x W I Width�, 1 <br /> x = square feet • 1- Length -H <br /> Circle= Area = It x(Radius/2 <br /> 3.14 x x = fquare feet ^- Radius <br /> Other=Get Surface Area from Manufacturer .'...') a=3.14 <br /> _ <br /> square feet . IY ) C 2'. -� i f <br /> ISN. er <br /> .QAC/1. <br /> 2. Calculate Gallons Per Inch <br /> There arc 7.5 gallons per cubic foot of jvolume, therefore 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 3+12 inchs per foot ••-------__________----- • <br /> x 7.5+12 = gallons/inch <br /> 3. Calculate Gallons to Cover l'unip(wit 1 2 inches of water covering pump) Estimated Sewage Flows in Gallons;• r dd... <br /> (Height(in)+ 2 inches) x gallons/incl (#2) (gpd) •• <br /> ( I, + )x 3 = 3 G t allons umccr <br /> 8 of <br /> Type I Type ;1 '1}pclll Type <br /> Bedrooms IV <br /> 4. Calculate Total Pumpout Volume 2 225 180 <br /> a. To maximize pump life select sump size for 4 to 5 pump operations per day. 3 . 300 218 ,(W <br /> 600 gpd +4 = J gallons per dose 4 000 375 2' <br /> b. Calculate drainback 5 750 450 . <br /> 1. Determine total pipe length, )� feat_. 6 9001 525 332 1, <br /> P P g - . 7 IOM 600 370 11 <br /> 2. Determine liquid volume of pipe,)7, gallons per 100 feet. 8 120:, •.75 408 column% <br /> 3. Multiply length by volume: Drainback quantity= <br /> SO feet xj/.U3gallons/100 ft.= 1.7/gallons. <br /> Pipe d1R,pCICr(int c;) Callon%p.. <br /> c. Total pump out volume equals dose volume+drainback 1 ; <br /> ISD gallons per dose+ 13,7? gallons= 1 S!.PIP.7? 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(#12)= I 2.5 <br /> 3 x 20 = 6 ,40gallons . 3 ,;,;.•+ <br /> 4 1 66.1 <br /> 6. Calculate Reserve Capacity(75% the daily flow) <br /> Daily flow(see page D-7)x.75= <br /> (OO x.75= LJSQ gallons I <br /> 7. Calculate total gallons 7 Reserve Capacity <br /> gallons over pump+gallons pumpout gallons alarm +gallons reserve capcity <br /> ##3+ ##4 c+#t 5+## 6 <br /> • - 6.2 + 1.57,7+ 69.9 + ea / allons y Alarn . <br /> v Pump On <br /> 8. Total Depth (Total gallon divided by gallon per inch) A <br /> Total Gall (##7)+gallon/inch(#12) . <br /> 16103,-"'-f- 73,3 = ti3 inches To al Pumpout Volar. ,. <br /> T Pump Off T <br /> Pump Height <br /> ..4. Float Separation Distance(equal total ptimpout volume) •. <br /> Total umpout volume(#4c)+gallons/inch (##2) <br /> /$-/,' + 23 3 = 6.1 0 ,inches <br />