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10 f 6 <br /> 1 17 <br /> £UMP_SELEL`TIoIin VCLI)URL <br /> (No PURR/RAT ION Of A Pr RIORAT ET) L ATF RAI <br /> A_ Determine pump capacity: <br /> Gravity Distribution ;;at,, a)�,`• <br /> 1 Minimum suggested is 600 gallons per hour (l0 gpm) to stay ahead of u......'"'' <br /> water use rate. I--+�°I.� I«- b, <br /> • • wlI%..4..w.....I <br /> 2. Maximum suggested for delivery to a drop box of a borne system is 2,700e,..,..,,,,...,o.HMO.Ia..rcn.el„ <br /> I ti..(. Mer Ie, <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,.,.P,. , w Iew, „•,• <br /> Ofelf.UMW <br /> Iar4 I�lled.I <br /> Pressure Distibution c,...,S uh., II.Ii «..w I*I...I <br /> 3.a. Select number of perforated laterals <br /> b. Select perforation spacing= feet. z Orlae.Y Sell Pr....r.y$carIIIe. <br /> Befor.Piecing Sand layer <br /> c. Subtract 2 ft.from the rock layer length. <br /> Rock 2 ft.= feet. <br /> d. Determine the number of spaces between perforations. <br /> Length pert.spacing= ft. + ft.= spaces Required Perforation Disc1,�e <br /> C. spaces+ 1 = perforations/lateral in gallons per minute(gpm)" <br /> f Multiply perforations <br /> per <br /> lateralbyof laterals to Discharge 152 �1 ade,,St total mberof perforationsn <br /> 1,,,,,y,,,,;- perforations. (feet) <br /> g <br /> 47rr x gym,T.r=t= gPm. ---- <br /> � 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY L_7_9 spm 2.0b 0.80 1.04 <br /> t _ <br /> B. Determine head requirements a. Use for single family homes <br /> 1. Elevation difference betweeniTmp and point of discharge. b.Use for all other applications <br /> feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> (.7 feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> Read friction loss in feet per 100 feet from table. I 1 <br /> Point of Dischar c <br /> F.L.= III 1 ft./100 ft of pipe - <br /> b. Determine total pipe length from pump to discharge Elevation Diffwwtce <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> 120 x1.25 = 133 feet <br /> c. Calculate total friction loss bymulti 1 n 1.5 inch 2.0 inch 3.0 inch <br /> P Y' g SPm Friaim lm per 100 ftof Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= 12s'3 x l .l 1 +100= ,2.6 feet 10 0.69 0.20 <br /> 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> q 18 2.03 0.60 <br /> + 0 + 2 20 2.47 0.73 0.11 <br /> � 3.73 _j,ll 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> TOTAL HEADI feet 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> C . Pump selection 55 4.76 0.70 <br /> GO 5.60 0.82 <br /> I <br /> 1�� 1. A pump must be selected to deliver at least <br /> S- gpm (Step A) with at )ea' t A feet of total head (Step ii). <br />