![]() ![]() The previously mentioned general 'head-to-head' layout is suitable for REGULAR SHAPED areas however, when an area is an ODD SHAPE, sprinklers should be laid out so that the spray from the first sprinkler hits the spray from the third sprinkler, and so on down the line. This diagram shows an alternative sprinkler combination, where sprinklers are put along both sides of the area-no wastage! An added benefit to this style of sprinkler layout is that when this method is applied using part circle sprinklers around the perimeter of an area, the water can be completely contained within the area, which means minimal wastage. The most common design layout of sprinklers is called ‘head-to-head watering’ where the spray from one sprinkler hits the next sprinkler on the head. Also note that with this 100% overlap some areas still only receive water from one sprinkler which is often less than adequate, and a better result will come from putting your sprinklers even closer together. This 'one-sided watering' diagram shows how the water from one sprinkler hits the next sprinkler which eliminates the dry spot at the base of that sprinkler, however the last third of the sprinkler’s radius would still have to be thrown outside the area to enable reasonable watering within the area. This means a sprinkler with a 4 metre radius (throw) should be no more than 4 metres away from the next sprinkler. This uneven watering can be mostly overcome by 'head-to-head' watering, where your sprinklers must overlap by at least 100% along your Pipe run. The only way to eliminate these dry areas is to use combinations of sprinklers while also following the basic sprinkler layout guidelines. This is less obvious in a garden but very noticeable in a lawn where dry areas will appear. One sprinkler on its own will not water an area very evenly. ![]() Sprinkler Radiusįor this reason when watering from one side only, the last 1/3 of the sprinkler's radius would have to be thrown outside the area to enable reasonable watering within the area. The LAST THIRD of the sprinkler radius has, on average, about HALF the precipitation (watering) rate of the first two-thirds of the radius, even though it looks like most of the water is going to the outer extremes. Water is propelled OUT from the sprinkler, not directly down, so there is minimal watering at the base of the sprinkler. But when plants grow bigger, they can “mask” areas of garden that your sprinklers watered in the beginning. It’s easy to forget that sprinklers won’t water around objects, in the enthusiasm of planting your garden and watching it grow. Sprinklers will not water around corners or through obstructions. A Sprinkler System Layout Guide A few facts about sprinklers: ![]()
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