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<br />l'UMf SlLLCTlON l'lUJCl:UURL
<br />/\ Determine pump capacity:
<br />Cr.wily Distribution
<br />1 Minimum suggest<xl 1'> <,0(1 g.111011~ p<'r hour ( 10 gpm) l<1 ·,LI\· .1h,•,1d ol
<br />wal<>r us<' rate.
<br />·J Maximum suggestl:'d for delivery lo ,1 drop bo:>. of ,1 ho111<· s,,-,1,·111 1-, ),700
<br />gallons per hour (45 gpm) to prevent build-up o! pressurl' 111 drup bo:>..
<br />Pressure Distibution
<br />l a Select number of perforated laterals ____ _
<br />b Select perforation spacing= ____ feet.
<br />c Subtract 2 ft. from the rock layer length.
<br />-c--c-a----,---:T-2 ft.== ____ feeL
<br />Rod, layc,r lc,y;t.h -.
<br />d Determine the number of spa('('s bctw<X'n perforations
<br />Length perf. spacing= __ ft. + __ ft.= __ space'~
<br />,.' __ spaces+ 1 = ___ perforations/lateral
<br />Multiply perforations per lateral by number of laterals to
<br />get total nun1berof perforations. 1,.,,_J. x pc,,JG,m-1= ____ p<'rforation'.>.
<br />I' ,"'!"' X gpovf,m = __ gpm
<br />SELECTED PUMJ' CAPACffY /0-40 gpm
<br />h l )ciennine he.id requirements:
<br />Elevation difference between pump and point of discharge.
<br />_ __,7,___ feet
<br />2. If pumping to a pressure distribution system, five feet for pressure
<br />3.
<br />4
<br />(.
<br />required at manifold if gravity JY5tem, zero.
<br />-~{,/'--_ feet
<br />Friction loss
<br />a. Enter friction loss table with gpm and pipe diameter.
<br />Read friction loss in feet per 100 feet from table.
<br />F.L = I, I I ft/100 ft of pipe 2S 6 t>tv\
<br />b. Determine total pipe length from pump to discharge
<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 =
<br />'-\S--X 1.25 = 56 feet
<br />c. Calculate total friction loss by multiplying
<br />friction loss in ft/100 ft by equivalent pipe length.
<br />Total friction loss = S6 x (. I I + 10{)== { • 0
<br />Total head required is the sum of elevation difference,
<br />special head requirements, and total friction loss.
<br />_J-+-----; _____o_ __ + _l __
<br />(1) (2) {3c)
<br />TOTAL HEAD __ 8 feet
<br />!'ump selection
<br />l. A pump must be selected Lo deliver al le.i'-l
<br />feC't
<br />gprn (Step A) with ,11 J,,.:•.f & fret of Iola! lll'ad r<,,,.
<br />1
<br />, 11,
<br />II
<br />I,..) f'CHf~OfiA.l ION CY A f"( Hf OHf\l f I) I hll HJ\t
<br />--c;,.-t._...,
<br />• ~. ~AJ l~1 11• le f<lo•
<br />~>='-""'""""~~-.....,..,-,._.• ·..,, of Ao.I. l..Qf'"
<br />~~-...,.,.-----v
<br />I 0n....-, ~u r,~r SGorcH-.:i
<br />O.,(on Pk>dn,q S.cu..:S lo,....
<br />Required Pcriorabon D,sc.ha:r~
<br />in gallons per minut~ (gpm
<br />Discharge
<br />~:z=d>~ \ md,!""" Head
<br />(f('(>{)
<br />--~----
<br />LOa 0.56 0.74
<br />2.0b 0.80 1.04
<br />---~---------
<br />a. Use {or single family home~
<br />b. Use for all other applications
<br />gpm
<br />JO
<br />12
<br />14
<br />16
<br />18
<br />20
<br />25
<br />30
<br />:15
<br />40
<br />45 so s·,
<br />(,t)
<br />Pipe Length
<br />F-186
<br />1.5 inch 2.0 inch 3.0 inch
<br />Friaiao Jou pc< I 00 ft o( pipe
<br />0.69
<br />0.96
<br />1.28
<br />I.63
<br />2.03
<br />2.47
<br />3.73
<br />5.23
<br />7.9<)
<br />11.07
<br />14 T<
<br />0.20
<br />0.28
<br />0.38
<br />0.48
<br />0.60
<br />OT\
<br />1.11
<br />733""
<br />2.0(,
<br />:>.64
<br />3.28
<br />0.11
<br />0 16
<br />023
<br />0.30
<br />I
<br />i O 39
<br />3.99
<br />048
<br />[ 0.58
<br />·1 7(, ! 0 7(1 !
<br />:w_J_~~J
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