Pressure Calculation Worksheet#
Complete this worksheet for the most pressure-demanding lateral, print it and submit it to the City with the irrigation plan.
| a. Pressure available at point-of-connection | psi | ||
| b. Pressure loss through the meter | - | psi | |
| c. Pressure loss through the backflow prevention device | - | psi | |
| d. Pressure loss in mainline pipe from backflow prevention device to remote control valve | - | psi | |
| e. Pressure loss through remote control valve | - | psi | |
| f. Pressure loss in lateral pipe form remote control valve to most remote sprinkler | - | psi | |
| g. Elevation change from point-of-connection to most remote sprinkler (0.43 psi per foot of elevation, (+) if sprinkler is lower, (-) if sprinkler is higher) | +/- | psi | |
|
h. Miscellaneous losses through other valves, strainers, etc. (in some cases, this will not be applicable) |
- | psi | |
| i. Total possible pressure loss (total of b through h) | - | psi | |
| j. Remaining pressure (subtract i from a) | psi | ||
| k. Minimum pressure required at sprinkler | psi | ||
| l. Difference (subtract j from k)* | psi |
If value of l. is negative, a booster pump may be needed. If the value is more than +15 psi, pressure reduction may be necessary for this and/or other zones.
Did You Know?
You can receive a rebate for purchasing a rain sensor.
There are 13 stormwater basins within the City of Fort Collins Growth Management Area, each with their own master plan.
Visual indicators of algal blooms in waterbodies often include: surface scum, foam, floating algae mats, off-colors and/or the presence of dead fish.