I have a few busted sprinkler heads so I decided to dig a trench along the line and examine the line. I was amazed that in a stretch of 60' the pipe went from 1-1/2" diameter to 3/4" to 1" then back to 3/4" as it goes downstream. I think over the year sections of pipes were being repalced or modified.
I assume the changes in the diameters like this would cause unnecessary pressure loss or even un-uniform pressure for each sprinkler head on that line? So I am planning to replace them all with a long stretch of pipe with the same diameter. I am not sure what diameter to use, should I stay with
1-1/2" or reduce it to a smaller diameter? This line runs down the middle of a side yard about 25' wide and 75 feet long but the run is only 60'. How far apart should I space the sprinkler heads if I used 360 degree heads?Another question is at the end of that 60' run is a big tree occupying the end of that yard, and the root system is such that I cannot trench any further. I am wondering if it's ok (will there be enough pressure) to put a big 360 degree impact rotor sprinkler head on the end of the pipe run to try to cover the area of the tree, but I don't know if it's going to have enough pressure to run that rotor sprinkler at the end of the line. How can I determine that without actually gluing up everything to try it?
Thanks,
MC