Comparison : Item # 3C-300-M10-P, 1-1/4 Inch (in) Port Size Manual Drain Coalescing Low Flow Separator
Item # 3C-300-M12-P, 1-1/2 Inch (in) Port Size Manual Drain Coalescing Low Flow Separator
Item # 3C-300-M16-P, 2 Inch (in) Port Size Manual Drain Coalescing Low Flow Separator
Item # 3C-300-M10-F, 1-1/4 Inch (in) Port Size External Automatic Drain Coalescing Low Flow Separator
Item # 3C-300-M12-F, 1-1/2 Inch (in) Port Size External Automatic Drain Coalescing Low Flow Separator