Patented by Cobco for use in center pivot systems, "the eXcluder" is a lateral line strainer.  The 3/4" eXcluder with 2 large o-rings fits into a steel gooseneck on a center pivot system.  It installs inside the mainline pipe at the pipe outlet. It strains off sand, gravel, rust and other trash from the outlet that are large enough to cause a stop-up.

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