I am doing a little remodeling on my sprinkler system I installed a couple of years ago with help from you fine folks. I am taking a zone with some awkward shapes in it and changing most of the heads to MP Rotators and adding a couple more. I think I have my flow and precip rates figured out OK. I started digging today, and ran into a little bit of a quandry. I have a lateral from the zone to be remodeled in the same trench with a lateral running to a drip zone around the corner. I have the point where I want to tie into the lateral dug up and the lines are side by side. I THINK I know which is which, but I really don't want to cut the wrong one. Any bright ideas on how to confirm I am cutting the right line? If I start the zone, can I feel a difference in the lines (while I am taking a shower)? The lines are 1" Class 200 PVC.