***UPDATE*** Thanks for all the replies***
The big 120 ft drain with 3 gutter spouts in it remains almost flat (maybe 4-6 inches of downward pitch - tops) for the first 85 ft or so. The last section is where it starts to pitch downward (another foot or so). I can't tell exactly how it...
***UPDATE*** Thanks fat-dad for the reply. Unfortunately it is not perforated pipe, it's only flexible 4 inch pipe. I mis-represented the product. It does not have perforated holes in the pipe that water can leak out of, so it will sit indefinitely in there until it dries. But the question...
I hired a contractor to fix some water issues in our backyard. We're on a hill and he went about 120 ft around two sides of our house with this drainage pipe. It's the perforated black piping, tied into our down spouts of our gutters, with a pop top at the end of the pipe to keep rodents out...
