DO not cover the pipe with the cap someone suggested
What happens. Rain nearly never falls Straight down (If ever) as it always has some wind in the mix so the pipe is what 10-12 feet the rain entering the pipe hits the inner surface of the pipe and follows it down. when it gets to the bottom of the big black pipe there is nothing to push it up and into the generator metal pipe so it drops to the ground. No problem.
And if the genny is running that elbow is over 220 degrees so steam results, not damage.
