Just wanted to let every one know that I recently purchased 4 rolls (1200 ft.) of 1-inch, 100 psi. poly. Manufactured by ENDOT Industries. Installed the system,(9 zones). On the downstream side of the control valves for one zone, there are eight Toro 15-H nozzles on 6-inch 570Z pops. Started the system, ran this particular zone and in about 10 minutes the heads faltered and then dropped! Found the leak right away, seem this run of pipe let go at about 35 to 40 psi. Today, two more leaks appeared. also split pipe! Called ENDOT and they told me to call my supplier. The run number for these rolls I purchased is, LOT P4 MAY 2 4 06 Shift 1. Ft. marking at 15868. Found out that if you squeeze the pipe end, it will split rather than bend. I figure the company must have runs that are in the miles rather than feet. Wondering who besides me, will bear the cost of replacing sections as they go bad? Just a heads up for anyone who may have bought some of this pipe.