Q: The method I and many other installers use to install leach lines is to suspend perforated pipe prior to installing rock, which requires walking in the trench, both to shoot the grade to maintain level in the bottom and installing the pipe level on supports. What do you think of this practice? A: I’ve devoted several columns to preaching about the importance of avoiding foot traffic in trenches during drainfield construction. So I’m not going to get in my pumper’s pulpit about that topic. But your mention of using perforated pipe points out that a little story of soil
