I had gophers chew holes in sched 40 and 80 PVC. They hear the water running and work to get at it. Sometimes I am not sure if they could not chew into iron pipe. They are destructive. Don Bowen KI6DIU New ruralize pages, follow the link off http://www.ruralize.com http://www.braingarage.com/Dons/Travels/journal/Journal.html