Here's a pic. of the coragated 1" hose I used and you can see the 1 1/2 to 1" reducer i Have on.
No wyou cant see it in the picture, but there is a slight incline in the hose. The 90 dregree deck drain does sit lower then the scupper, but, this is the only type of drain that I could find. I had the same drain as you and checked everywhere, even pool stores and couldnt find that part. ...90.
