I used the 4" PVC sewer street elbows, they call them 'long' but they are far from long... Also not to be confused with common Schedule 40 PVC pipe or elbows... 4" sewer PVC is about 3.25", smaller and thinner then 4" PVC Schedule 40...
Note these 'sewer' fittings are NOT with the rest of the PVC in most big box hardware stores, they are generally in another drainage isle or out in the outside garden area... Look for green colored drains or the big 4" rolls of black crinkle tubing, these elbows are probably in that area...
Search Lowes website for '41P0ST' Or you can Google that part number as well but shipping will kill you...
http://www.ndspro.com/PDFs/Tech-Spe...ree-Long-Turn-Street-Elbow-X1P0ST-X10STxx.pdf
Thanks for the info!! I'll have to try looking outside