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Horizontal Tee With Two 2-1/2 Inch Slip to 4 Inch Transitional With Reducer Bushing to 3 Inch operating-altitude_0-1999 FT This item includes pre-drilled holesThis is an AquaStar 4 inch slip x 4 inch slip x 2 1 2 inch slip horizontal tee with two 4 x 3 inch reducer bushings. This tee has a universal fit for AquaStar skimmer bottoms and "B" dual port PVC sumps. It converts two 2 1 2 inch spigot to 4 or 3 inch tee. The horizontal tee comes complete with two 4 x 3 inch reducer bushings. And this item is constructed of white Schedule 40 PVC. Materials are NSF approved.