Yikes
Sprinklers...
When I was a pup.. I had a job in New Orleans in the middle of the summer to dismantel an old sprinkler system.. It had been in place over 20 years,,, and you can't imagine (maybe you can) how foul water can get sitting for 20 years in an old pipe,, Who know what kind of critters were livin in that dark warm pipe.... It could have been on that "worst jobs" show... man it was gross.