What is the Max Pressure for "Raindrip 1/4-in x 50-ft Polyethylene Drip Irrigation Distribution Tubing?"

I tried this product and discovered it only drips for the first 30 feet of the 50-foot line (and will not even supply water to any additional lines attached at the end). The water coming out in the first 30 feet gushes out like a waterfall. I was told by a landscaper that 30 lbs of pressure is the most you should use for these. I had to go back to my solid pipe (as big around as your thumb) with little tiny rubber lines coming off it and directing water to single little sprinklers all along the pipe. It's not low cost because these spray the water in circles too wide for my area, which is a waste of about 50% of the water being sprinkled, and also have to be set close enough together to sprinkle their water into the "dry" donut hole under each of their neighboring sprinklers.....but it is the only solution that even comes close to working for me. Not happy, but dealing with it.....

This works well for micro sprinklers using 5/8" tubing for the supply and 1/4" tubing for each sprinkler. The work with standard water pressure.