Number Of Pumps Vertical Drop (Inches) Average Vertical Drop 2 27.1 26.9 26.9 27 26.7 26.9 26.7 27 27 26.5 27 27 26.8 27.1 27 26.9 3 20 19.4 19.6 19 19 19.1 18.9 19.8 19.8 19 18.8 19.4 20 19.2 20 4 15.1 15.2 15 15.4 15.5 15.5 14.9 15.2 15 14.8 15.6 14.9 15.1 15.2 15.4 5 12.9 12.7 13 12.5 12.8 12.9 12.7 12 12.2 12.7 12.9 13 12.5 12.8 12.7 6 11 11.1 11.2 11.5 10.8 11.2 11 10.8 12 11 10.8 10.9 10.8 11.3 11.4 7 9.3 9.3 9.4 9.1 9.3 9.3 8.9 8.9 9.5 9.2 9 9.5 9.5 9.7 9.3 9.2 8 7.5 7.8 7.7 7.5 7.7 7.9 8.1 8.2 7.8 7.5 8 8 7.8 7.8 9 5.9 6.2 5.8 6 5.9 6.4 6 6.5 6.2 6.5 6.5 6.3 6.2 5.9 6.5 6.3 10 6 5.4 5.4 5.5 6 5.4 5.7 5.1 5 5.3 5.2 5.1 5.1 5.2 5 6.1 11 5.4 5.5 5.5 5.1 5.7 5.3 5.3 5.2 5.4 5.7 6 5.6 5.2 5.6 5.4 5.6