I noticed a leak at the joint of
a down pipe and
An-elbow, yet rain water flows through the down pipe as expected but quite a large amount of water is dripping (I outlined with red on the photo).
There is an incline (so that water flows down), no holes in pipes. I tightened the connection but still for whatever reason it drips.
I looks to me that rain water traps in between the sloped pipe and the elbow and starts dripping to get its way out.
Any suggestions on what else I can improve to fix this?