I spent 9 1/2 hours on Thursday and Friday fixing fisher chews on 304 taps on a 1,500' long 1" mainline. I did 81 repairs from replacing multiple chewed drops to 15' long sections of completely chewed 5/16 line. The only way to find the "hidden chews" (one bite on a drop) was to run my hand over every inch of the 5/16 tubing and every drop. That made for two rather unpleasant days. Time to set the traps out again. Plus one deer chew, but that one was easy to spot.
2004- 470 taps on gravity and buckets
2006- 590 taps on gravity and buckets 300 gph RO
2009- 845 taps on vacuum no buckets, 600 gph RO
2010- 925 taps on vacuum new 2 stage vacuum pump
2014- 3045 taps on vacuum, new 1200 gph RO
2015- 3104 taps on vacuum
2017- 3213 taps on vacuum
3' x 10' oil fired evaporator with steamaway