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ruMrscm cTi oN frocedure <br />A. Determine pump capacity: <br />Gravity Distribution <br />1. Minimum suggcsicd is 6(M) (;nllons per hour (10 gpm) (u stay alK’ad of <br />water use rate. <br />2. Maximum suggested for ilelivery to a dr<»p Ih >x of a liome system is 2,700 <br />gallons per hour (45 gpm) to pievent build-op of pressure in tirop Intx. <br />Pressure Distribution <br />3. a. Select number of jicrforated laterals 3 <br />b. Select jK*rforalion spacing = ft. <br />trro PEnrouAnoN of a PcnronAieo LATEnAt <br />-0««et C*tftr <br />&-JEW <br />c. Subtract 2 ft. from the rock layer length. <br />Kock Uyet h <br />cl. DclcrniiH? Ihc number of spaces bel ween perforaliuns. <br />Lengih perf. spacing = l i ^ ft ♦ . fl. = tO 7 spaces <br />V spaces 1 = i V 5 perforalions/laleral <br />Mulliply perforalions |>er lateral by number of laterals to <br />c. <br />f. <br />gU lotal nimiber of perforations. <br />l4r. * perforations. <br />fv <br />. feet <br />(II (2) (3c) <br />TOTAL IltAD / "2. feet <br />Laomy Sand Uyar <br />Claon S«i»d Loyar <br />Layer ef Ctatfittlt fobrit tef l»» <br />/ * tn»h toyer of Iwy •r «lre« tavtrtd <br />^ . with tfd^taita paper) <br />“Vrnr -/ti Ltatl 17' la Cdat <br />■ al Hack Laftf <br />• Farfutaibmi Laea»a4 •! <br />BaitaiM af Laitipl <br />V— --------—^^ Oilftnal Sail Froperly Searifted <br />Btlart Flacinf Sand Layrf <br />TAIH.F. or PERFORATION DISCI lARCES IN C.FM <br />pSttiTCiafal <br />B- <br />SELECTED TUMI’ CAPACITY gpm <br />I). Determine head requirements: <br />1. Elevation difference between pump and point of discharge. <br />—<L2_fcet <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at manifold ^ <br />^ feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pi|^H.' diameter. <br />Read friction loss in feet |>er ItX) feet from table. <br />F.L « ft./l(K) fl of pijrc <br />b. Determine lotal pipe length from pump to discharge <br />point. Add 25 percent to pijn? length for fitting <br />loss, or use a fitting loss cirart. Equivalent pipe <br />length -1.25 times pijjc length = . <br />^ S X 1.25 = !()(; feel <br />c. Calculate total friction loss by mulliplyiog <br />friction loss In ft/ l(K) ft by equivalent pipe lengih. ^ <br />Total friction loss = x__»1(M) = J <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and tola! friction loss. <br />1 lc.id rcrfoialioii diameter (itKlics) <br />v„V, <br />l.Cb 03<> <br />------■*^^.90 <br />2.0b 0.80 1.01 <br />2.5 0.89 1.17 <br />3.0 0.98 1.28 <br />4.0 1.13 1.47 <br />5.0 1.26 1.65 <br />aUse 1.0 fool of Iwad for lesidenlial systems. <br />bUsr 2.0 feet of Iwad for other esIabFishments <br />Pi|ic Length <br />2. Pump selection <br />■ 1. A pump must be selected lo deliver at least gpm (Step A) <br />with at least 2.^ feet of total head (Step U). <br />I.Sinch 2.0 inch 3.0 inch <br />gp„l rtlction Imt pcf 100 fl of pipe <br />to 0.69 0.20 <br />12 0.96 0.28 <br />H 1.28 0.38 <br />16 1.63 0.48 <br />IK 2.03 o.r»o <br />20 2.47 0.73 0.11 <br />25 3.73 l.ll 0.16 <br />30 5.23 1.55 0.23 <br />35 7.90 2.06 0.30do11.07 2.64 0.39 <br />45 14.73 3.28 0.48 <br />50 <br />55 <br />0.58 <br />0.70 <br />60 ”5.60 0.82