I was building an above ground pool with a 36'x36' deck around it. I wasn't sure exactly where my septic tank was located, I knew it was probably in line with the vent on the roof of my house but wasn't sure. Someone that I know told me to cut 2 pieces of coathanger equal length and bend at right angle about 4" of the hanger. Hold it in a fist lightly and walk back and forth and when they cross that's your pipe. I'll be dang if it didn't work just like they said. I found the tank and leach lines so when I leveled off the area for the pool I knew I wouldn't hit any of them. That was pretty cool!

OLD GEEZER FISHERMEN NEVER DIE, THEY JUST SMELL THAT WAY!!