Blow-out is an exothermic process that deserves some contemplation. (11/26/17)

[Two years in a row, we ‘melted’ PVC mainline during blow-out?  This year, we switched to a smaller compressor and a longer blow-out window…fewer heads running at once. We also replaced the melted PVC mainline with CPVC…more heat tolerant.  Hopefully, this will help?]