What is the diameter of the shower drain? Are there various diameter sizes that are commonly used?A. The Jacuzzi EM79827 is 4.25" and is a standard outlet size.
Will this shower drain fit the American Standard 3636Y1.ST Shower Base as there are no specs on this product?A. Your need an American standard drain to fit your American standard shower
I'm not seeing the "flange" that attaches to the drain…you know the twist and lock into place…does drain have that?A.
The Jacuzzi EM79827 drain does come with a twist close option.