Available Sizes IP Drain Flange .5 Size: 1/2" IP Drain Flange .75 Size: 3/4" IP Drain Flange 1.0 Size: 1" IP Drain Flange 1.25 Size: 1 1/4" IP Drain Flange 1.5 Size: 1 1/2" IP Drain Flange 2 Size: 2" IP Drain Flange 2.5 Size: 2 1/2" IP Drain Flange 3 Size: 3"