[almondz]

I took a water hose and put down in the downspout about a foot with water on high. Walked straight out into the yard from the downspout until I found the area that got wet. It took less than 15 minutes of running the water. Pulled up the turf and there was the pop up. Mine was close to the street but not always. You can also buy a dye and do the same thing - watch where the dye comes out.