Laserfiche WebLink
PI IMP SET^grrinN procedure <br />A. Determine pomp capacity: <br />Gravity Distribution <br />1. Minimum suggested is 600 gallons per hour 00 gpm) to slay ahead of <br />water use rate. <br />2. Maximxun suggested for delivery to a drop box of a home system is 2,700 <br />gallons per hour (45 gpm) to prevent build-up of pressure in drop box. <br />Pressure Distibution <br />3. a. Select number of perforated laterals <br />Select perforation spacingb. <br />c. <br />feet <br />d. <br />e. <br />f. <br />g- <br />Subtn^ 2 ft from die rock layer length. <br />- 2 ft ■ 0^ feet <br />Detonnme the number of spaces between perforations. <br />Length perf.spacing■ OA ft3, ft.» spaces <br />spaces1 ■ 2^ pezforations/lateral <br />Muldply perforations per lateral tw number of laterals to <br />get total number of peiforations. x n perforaorations. <br />SELECTED PUMP CAPACITY gpm <br />B. Determine head requirements: <br />1. Elevation differeiKe between pump and point of discharge. <br />,/-U— feet <br />if pumping to a pressure distribubon system, five feet for pressure <br />required at rrumifbld if gravity system, zero. <br />^ feet <br />Fricbon loss <br />2. <br />3. <br />a. Enter fricbon loss table with gpm and pipe diameter. <br />Read diction loss in feet per 100 feet from table. <br />F.L - ^ . ft/100 ft of pipe <br />b. Determine total pipe length from pump to discharge <br />point Add 25 percent to pipe len^h for fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />len^ • 1.25 times pipe length <br />5 M / X 1.25 .O <br />c. Calculate total diction loss by multiplying <br />diction loss in d/100 ft by equivalent pipe length. <br />Total diction loss ■ x' x '^OL. ♦lOO = ^feet <br />4.Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />7 <br />(1) (2) <br />TOTAL HEAD .3d <br />(3c) <br />feet <br />C Pump selection <br />1. A ptunp must be selected to deliver at least <br />43^ gpm (Step A) with at least feet of total head (Step B). <br />F-17 <br />DO ^CRFC^TION or A rci^roAATco latcaal <br />% <br />' V-iM of ioMsetle Aibrtt (if lii#* <br />/.•iSfclAAr •• tier • ^4*^ <br />in <br />lirad Ptfforaiion Dischaivt <br />Diachafgt <br />HMd .%j—p-Jj <br />1.0a <br />2.0b <br />0.56 <br />0.80 <br />0.74 <br />1.04 <br />a. Use for single family homes <br />b. Use for all other applications <br />Pipe Length <br />Po int of Discharge <br />u <br />Elevation Diiference <br />Pump i 9.S <br />F-18b <br />8Pni <br />1 ^ inch LO inch 3.0 inch <br />Friotantepir IGOAeTpipe <br />10 0.69 0.20 <br />12 0.96 0.28 <br />14 1.28 0.38 <br />16 1.63 0.48 <br />18 2.03 0.60 <br />20 2.47 0.73 0.11 <br />25 3.73 1.11 0.16 <br />30 5.23 1.55 0.23 <br />35 7.90 2.06 0.30 <br />40 11.07 2.64 0.39 <br />45 14.73 3.28 0.48 <br />50 3.99 0.58 <br />55 4.76 0.70 <br />60 5.60 0.82