This happens a lot in Florida.
Happened to my next door neighbor.
Small king snake (non venemos but hurts like Heck), bit him on the hand.
5.56mm
This is what happens when you let government treatment plants handle your waste. You hook up to a line that lets snakes in.
A snake isn’t likely to get into an underground septic tank and make its way to the house.
Escape snake attacks, home sewage! You can treat your sewage at home! Send for my home sewage information pamphlet.