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<br />- Check heads for correct spray pattern. Spray patterns should match physical <br />characteristics of site, such that patterns do not spray concrete, asphalt, fences, <br />or buildings. <br /> <br />- Repair or replace sunl<en, tilted, brol<en, or clogged heads to improve the <br />distribution uniformity. Such problems are relatively easy to fix and greatly <br />improve the efficiency of a zone when repaired. <br /> <br />- Match precipitation rates of each rotor head within a zone to avoid over or <br />under watering. Quarter-turn heads should emit half the amount of water as <br />half-circle heads. Likewise, a full-circle head should emit double the amount <br />of water as a half-circle head. For example, if the comer heads in a square <br />area deliver 2 gallons of water per minute, the heads along the edges of the <br />square should deliver 4 gallons of water per minute, and the full head in the <br />center should deliver 8 gallons of water per minute. If all heads are delivering <br />the same volume of water, the center area won't receive enough water while <br />the comers will get too much. <br /> <br />- Replace irrigation heads within a zone so that all heads are of the same type <br />(i.e. same brand, same type, same model). <br /> <br />- Address incorrect pressure levels if necessary. <br /> <br />- Install check valves where appropriate <br /> <br />- It is not recommend to remove mature trees and shrubs. Where possible, <br />trees, bushes and plants should be pruned and trimmed to allow the sprinkler <br />heads to function properly. In some instances where pruning may not be <br />feasible, it is recommended to relocate the affected sprinl<ler heads. <br /> <br />- The majority of drip systems are not visible, which makes visual inspections <br />difficult to utilize. However, the moisture levels of the plants should be <br />checked on a regular basis to mal<e sure that they are receiving the appropriate <br />amount of water. Oftentimes, plants that are receiving too much water 1001< <br />similar to plants that are not receiving enough water, so a visual check is not <br />always sufficient. Also, mal<e sure emitters are in beneficial locations and that <br />the capacity of the drip line is not being exceeded by the number and caliber <br />of emitters. Check precipitation rates for emitters to see that they match the <br />needs of the plants. <br /> <br />- Aerate or de-thatch your lawn regularly <br /> <br />- Most control clocks have batteries in them for backup in case of power <br />outages. It is recommended that batteries be replaced once a year. <br /> <br />- Replace turf, where appropriate, with hardscape or water-conserving plants. <br /> <br />25 <br />