I am installing a bathroom in my basement. My layout has the shower lined up so that the drain will be between the main connection to the sewer and the street. Therefore I would have to backtrack and run the shower drain parallel to the current drain and insert a 90 elbow to get it to the house drain. My question is, as long as it is sloped properly, is there any reason to not install a 90 elbow in the run? Thanks.
90's come in three paterns: short sweep, medium sweep and long sweep. Also called short, med., and long turn. In your case (laid on its side in the horizontal) you want a long sweep 90. You can also use 2 45's glued together to make a 90. These will give you the long sweeping pattern the inspector will look for
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