My yard is evolving. The "yard" is bounded by woods, driveways, and naturalized prairie plantings. As my young zoysia has set its feet and the prairie has developed its character, the edges have been somewhat fluid. The driveways have been an ongoing project as well. So now I have a half dozen heads that I would like to move a few feet. Right now I have a mix of 6" ready made Hunter swing joints and 6" to 9" funny pipe connections. How far can I run blue line funny pipe before I start seeing significant alterations in flow and pressure? I would love for the answer to be 8 - 10 feet. I could live with 4 or 5. If it is 2 or 3, I'll have a lot more digging and gluing to do.