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How important are the runners and risers for lawn sprinklers?

How important are the runners and risers for lawn sprinklers?

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  #1  
Old 06-27-11, 12:22 PM
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Join Date: Dec 2000
Location: Florida
Posts: 133
How important are the runners and risers for lawn sprinklers?

From what I have been reading, some insist on using runners and risers when laying the pipe for a sprinkler system. Basically a 2 layer system.

Others simply use a single runner and feed directly into the pipe.

Are there any pros/cons to either?

Here is an ugly diagram to illustrate.

The image on top is a single runner and simply tapping into it as needed.
The image on the bottom uses a runner but then a riser when ever heads are to feed off the runner.

 
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  #2  
Old 06-27-11, 01:23 PM
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Join Date: Mar 2003
Location: NC, USA
Posts: 17,660
I don't like having a sprinkler head going straight down into the trunk line. If someone steps on it or drives over it with a mower or car that force pushes straight down and might break the trunk line or fitting. If the sprinklers are fed by a line that branches off from the trunk line the sprinkler head hopefully can move a little without breaking the pipe. Having the side branch lines also makes it easier to locate them exactly where needed.
 
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