F-Series 3-in-1 boxes. Available in single (deep), double and triple gangs, these boxes can be adapted to accommodate three sizes of conduit ( 1/2, 3/4, 1 inch) in one box, reducing inventor y and ensuring that contractors will have the size they need when they need it. The 3-in-1 box comes with a standard 1 inch hub which can be resized to 3/4 or 1 /2 inch using the supplied reducer bushings. For the 3/4 inch entry y, solvent cement the 3/4 inch reducer into the 1 inch hub. For the 1/2 inch entry, first solvent cement the 3 /4 inch reducer into the 1 inch hub, then cement the 1/2 inch reducer into the 3 /4 inch reducer.