Leaks and/or breaks: Once a month run your system in manual or test mode to check for leaks or breaks. This helps protect against plant loss and offers a simple way to conserve water. Also look for broken or tilted sprinkler heads, rotors stuck in place, misting (indicates water pressure is too high), uneven water coverage due to poor head spacing (water sprayed from each sprinkler head should reach adjacent sprinkler heads, also known as "head to head coverage"), heads not at grade (too high or too low), mismatched sprinkler heads and nozzles (prevents even precipitation rates), spray patterns blocked by plants, clogged nozzles or drip emitters, clogged filters, leaking or separated drip lines or missing emitters.
If sprinkler heads or drip emitters become clogged, they will need to be flushed. Sprinkler systems: remove individual nozzles from sprinklers. Turn system on for a few minutes until a clean, solid stream of water flows from each sprinkler head. Turn system off. Check nozzles for debris before replacing to be sure they are not clogged. Clean and replace clogged nozzles. Turn system on and check for proper operation.
Drip systems: Remove end caps from drip lines. Turn system on for a few minutes until a clean, solid stream of water flows from the end of the line(s). Turn system off. Replace end caps. Turn system on and check for proper operation. Replace emitters that are not functioning properly.
Adjust sprinkler heads as much as possible so that water from each head just reaches the adjacent head(s). This overlapping pattern improves water coverage and can reduce dry and wet spot problems. Be sure sprinkler is watering the area it was designed to cover.
Determine if sprinkler heads within each valve circuit match (not all brands and models are interchangeable and/or compatible). Be sure that sprinkler heads within each valve or zone have the same precipitation rate for even coverage. Additionally, the radius of nozzles (the distance the nozzle is designed to spray water) should match actual spacing of sprinkler heads to achieve head-to-head coverage.
Check hose bibs and valves to be sure they are not leaking.
If dry or soft wet spots are present in lawn or shrub areas, make adjustments to improve the irrigation system inefficiencies.