Main Line Leak

We recently repaired a leak in the 6" mainline in front of #13 tee.  The damage to the pipe was caused by the wear of a rock in contact with the pipe.  Typical practice is to backfill any/all pipe with rock free material to prevent this phenomenon from occurring.  This leak is the second leak of it's kind in the past month.  A similar repair was made on the 4" mainline on the left side of #2 fairway earlier in the month.  


The PVC pipe that carries water throughout the course was installed in 1978.  It has held up quite well, but it's wear is beginning to show with an age of 33 years.   The typical life expectancy of an irrigation piping system is 10-30 years based on information provided by the ASGCA.