The MP Rotator's coverage distance depends on incoming pressure. You may not have the correct pressure if you are not achieving the desired distance.
If the distance of coverage is short, you may have low pressure. First, check if your valve has a flow control handle (knob in the center of the valve). If so, you may be able to increase the flow from the valve. Open the irrigation valve flow control handle by turning the handle counterclockwise. If the valve flow control is fully open and you're still not getting the distance required, the flow for that zone is too high (using too many heads) or a possible break in the piping is causing a reduction in pressure.
If you cannot adjust the radius down to the low end of the range, then the incoming pressure may be too high for the minimum desired radius. Use the Pro-Spray PRS30 Sprinkler Body to maintain 30 PSI (2.1 bar; 210 kPa) at the MP Rotator Nozzle for minimal radius options. Use the Pro-Spray PRS40 Sprinkler Body to maintain 40 PSI (2.8 bar; 280 kPa) at the MP Rotator Nozzle for optimal performance and distance.
A great tool to measure the pressure at the MP Rotator Nozzle is the MP Rotator Gauge (MPGAUGE).
To obtain an MP Rotator Gauge for your MP Rotator Nozzles, please contact a local Hunter Distributor or purchase one from our online store.
For instructions on adjusting the radius and arc, please click here.
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