He has his down spout run into pvc pipe that hooks to his sump pump
pipe. When the pump turns on, the water gushes out of where the
aluminum downspout connects to the pvc. Then it ponds at the corner of
his house. Since his house sits within 20ft of mine, I wonder if my
sump pump is working overtime. First, it works on my water, then it
has to pump the water from his recycling.

I think he did it himself, so I'm wondering if he just has a blockage
in the pipe that goes to the yard or is it wrong to hook up your down
spout to the sump pipe. The guy's not the easiest to talk to, so I
want the facts before I talk to him.