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The most evident features end up being large radius transition regarding the pan floor and its sidewalls. Secondly, the flange (also referred to as a weep edge) is 1-1/2" tall. I have seen pans that don't incorporate a vital flange or have flanges 1/2" to 1" taller. The added height created to minimize, if not eliminate, water being picked behind the wall surround panels which could ca