Adjust spray arc
Fixed spray nozzles must match the lawn edge or they will water pavement.
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Sprinklers spray hard surfaces when nozzles are aimed wrong, heads are tilted, arcs are misadjusted, pressure is too high, or the original layout does not match the lawn edge.
Sprinklers spray the driveway or sidewalk because the spray pattern is reaching outside the lawn area. The cause is usually a wrong nozzle arc, a tilted head, a head installed too close to the edge, high pressure causing mist drift, or a rotor stop that has moved. The certain fix is to run the zone, stand behind each head, and adjust the arc so water stops at the lawn edge. If adjustment cannot solve it, change the nozzle pattern or relocate the head. Watering pavement is not useful irrigation; it wastes water, can create runoff, and often leaves nearby grass dry.
| Question | Certain Answer |
|---|---|
| Most likely cause | Misadjusted arc, tilted head, wrong nozzle, or excessive pressure. |
| Water fact | Water landing on concrete does not help lawn roots and can run into drains. |
| Quick fix | Adjust arc and straighten heads before changing runtime. |
| When replacement helps | Use a quarter, half, strip, or rotary nozzle that matches the lawn shape. |
Fixed spray nozzles must match the lawn edge or they will water pavement.
Rotors can be adjusted so they stop before the driveway or walkway.
Narrow side yards often need strip nozzles instead of full-circle heads.
If water runs down concrete, the system is watering faster than the area can absorb.
Overspray is common after soil settles around sprinkler bodies. A head that was level during installation can tilt toward a driveway over time.
High pressure can make the spray look wider than the nozzle rating, especially on windy days or near open front yards.
For curved beds and narrow side yards, nozzle selection matters more than runtime. The right pattern can save water immediately.
If the lawn edge changed after landscaping, sod work, or interlock installation, the sprinkler layout may need to be updated too.
Yes. It wastes water and can cause runoff without helping the lawn.
Usually yes for simple arcs, but broken or tilted heads may need repair.
A head may have shifted, a nozzle may have been replaced, or pressure may have changed.
No. A timer cannot fix a bad spray pattern.
Need help with irrigation, sod, planting, drainage, or lawn problems in Toronto or the GTA? A proper diagnosis can prevent wasted water, dead grass, failed plants, and repeat repairs.
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