2008 - Soil & Percolation Testing

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Pump Selection Design Worksheet 1. PUMP CAPACITY -,.....--\,...`N.--21 1. Pumping to Gravity Distribution A. Minimum discharge is 10 GPM(15 GPM recommended) GPM B. Maximum discharge is 45 GPM. 2. Pressure Distribution-See Pressure Distribution Worksheet Required Flow Rate (Line 20 of Pressure Distribution Worksheet) 38 GPM 2. HEAD REQUIREMENTS Son treatment system &point at&chow 3. Elevation Difference 10 ft own.. ywMtl" fir. between pump and point of discharge: max ji � mneme +v Table 1 Friction Loss in Plastic Pipe per 100ft 4. Distribution Head Loss: 5 ft Distribution Head Loss Nominal Pipe Diameter Gravity Distribution=Oft Flow Rate (GPM) 1 11/41)14 2 3 Additional Head Loss: ft Pressure Distribution based on Minimum Average Head (due to special equipment,etc.) Value on Pressure Distribution Worksheet: 10 5.51 1.45 0.69 0.20 - Friction Loss 1 ft = 5ft 12 7.72 2.03 0.96 0.28 - 5. Supply Pipe Diameter: 2.00 Inches 2ft = 6ft 14 10.27 2.70 1.28 0.38 - 6. Based on Friction Loss in Plastic Pipe per 100ft from Table I: 5ft = 10ft 16 13.14 3.46 1.63 0.48 - Friction Loss= 2.82 ft per 100ft of pipe 18 - 4.30 2.03 0.60 20 - 5.23 2.47 0.73 0.11 7. Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge point. Estimate by adding 25%to supply pipe Length for fitting loss. 25 - 7.90 3.73 1.11 0.16 Supply Pipe Length X 1.25=Equivalent Pipe Length 30 - 11.07 5.23 1.55 0.23 Supply Pipe Length: 125 ft X 1.25 = 156.25 ft 35 - 14.73 6.96 2.06 0.30 8. Calculate Supply Friction Loss by multiplying Friction Loss Per 100ft (Line 6)by the 8.91 2.64 0.39 Equivalent Pipe Length (Line 7)and divide by 100. 45 - 11.07 3.28 0.48 Supply Friction Loss= 2.8186237 ft per 100ft X 156.25 ft + 100 = 4.40 ft 50 - - 13.46 3.99 0.58 10. Total Head requirement is the sum of the Elevation Difference (Line 3),the Distribution Head 55 • - - 4.76 0.70 Loss(Line 4),and the Supply Friction Loss(Line 8) 60 5.60 0.82 10 ft + 5 ft + 4 ft 65 - - - 6.48 0.95 70 - - - 7.44 1.09 Total Head Required: 19 ft 3. PUMP SELECTION A pump must be selected to deliver at least 38 GPM(Line 1 or Line 2)with at least 19 feet of total head. I hereby certify that I have completed this work in accordance with all applicable ordinances,rules and laws. Joseph J Olson -�`- 810 November 24,2008 (Designer) (Signature) (License#) (Date)