(Continued from Part 3.) Delivery Line Pressure Specifications Water pressure per foot of head, in the Dankoff chart indicates 60 PSI static pressure at 140 feet. When water is pumped, if my gauge is accurate, 60 PSI was reached at about 100 feet. Note that 60psi is the maximum pressure rating of most 1/2″ drip irrigation that is the least expensive black poly pipe. As a quick reference when designing a system, download the PDF of this chart. To save money, you can use inexpensive black poly pipe rated for 100 or 160 PSI for lifts above 120 feet. To …
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