Make the change now to get improved distribution uniformity of your irrigation system and with it, even growth.
In this category we have selected four different nozzles to offer four flow rates with two sprinkler configurations.
How to Select and Size Your Upright Microsprinkler in 5 Easy Steps
Step 1: Visualize the area and your bench layout. You may need single or multiple lines with low flow for narrow benches, or multiple lines with high flow rates for good overlap in wider benches. Make sure there are no obstacles, such as beams, curtains and anything else that can prevent good coverage. Last, determine the height at which you plan to have the sprinkler installed above the benches.
Step 2: Select the upright microsprinkler head from the product list based on your application requirements and design features, such as desired flow rate, sprinkler spacing and uniformity: (see chart for spacing and uniformity of microsprinklers below)
|Coefficient of Uniformity (CU)|
|Bench Width in Feet|
|98||98||96||97||93||89||90||89||90||Low Application Rate (18 to 19 GPH)|
|93||96||90||94||93||93||94||93||91||91||88||High Application Rate (32 to 43 GPH)|
Determine the quantity of sprinklers needed. For information on how to select and size the polytube laterals, filters initial start of the system, troubleshooting and maintenance see steps 3 thru 8 below
Step 3: Sizing the sprinkler lateral lines for your bench length based on the maximum number of heads allowed on each lateral
We strongly recommend polyethylene pipe (polytube) for use in the laterals in your layout. Light can penetrate PVC pipe, which can cause algae to grow, leading to many problems, including plugged emitters.
Information you will need to finalize your installation:
Bench length and number of sprinklers, sprayers or foggers allowed on the polytube (see chart for max recommended # of heads allowed on laterals)
Maximum Recommended number of Upright Microsprinklers on Polytube
|Benchlength in feet||25'||50'||75'||100'||125'||150'|
|Microsprinklers flow rates in GPH||19||32||42||52||19||32||42||52||19||32||42||52||19||32||42||52||19||32||42||52||19||32||42||52|
|Maximum# of sprinklers on 1/2" line||5||4||3||2||6||5||5||4|
|Maximum# of sprinklers on 3/4" line||7||6||5||4||11||9||7||6||13||11||9||8||15||13||11||10||17||15||13||12||19||16||13||12|
|Maximum# of sprinklers on 1" line||19||16||14||13||19||17||15||14||20||18||17||16|
Determine the quantity of sprinklers needed, and for information on how to select and size the polytubing laterals, filters initial start of the system, troubleshooting and maintenance see steps 3 thru 8 below
Step 4: Sizing the distribution main line
Use the chart below to select the size for your distribution line up to 100 feet, and for your main line up to 125 feet in length. This chart should serve as a general guideline only.
|Distributor Pipe Sizing|
|Pipe Size||Maximum GPM|
|Main Line Pipe Sizing|
|Pipe Size||Maximum GPM|
Step 5: Sizing the main control components, such as valves and filters
The components should be sized according to the flow range of the filter. Make sure not to exceed this recommendation.
|Sizing the Filter with 120 Mesh||Sizing the Filter with 150 Mesh|
|Plastic Screen Filter||Maximum GPM||Plastic Disc Filter||Maximum GPM||Plastic Screen Filter||Maximum GPM||Plastic Disc Filter||Maximum GPM|
|1 1/2"||40||1 1/2"||60||1 1/2"||35||1 1/2"||50|
Step 6: Starting the system for the first time and flushing the system
The most important thing for you to remember when starting a new system for the first time is to flush the lines. Debris from the installation can pass into the sprinklers and foggers and can cause the system to plug, or to operate improperly. To properly flush the system, first connect the valves, filters, and main and distribution pipes. Then flush the line. Second, connect the lateral pipes and then flush the whole system again. Third, attach the sprinklers or foggers, open the ends of the laterals and have a final flushing of the whole system. Close the ends of the laterals one by one before the water is turned off. After complete flushing, check that the system is operating correctly and adjust if needed.
Step 7: Troubleshooting
Step 8: Maintenance