Air Gap International Gap-A-Flo Inline Air Gap Drain Provides an in-line air gap, usually installed in the last 5 feet (1.5 meters) of the indirect drain piping and must be in the down leg of the drain line piping. Unit can be tilted at any angle (down as low as 45 angle) when installing if needed, (window opening on top side). Molded clamp groove plus included "Jiffy Clip" enable easy vertical wall mounting. Unique design incorporates a rotatable splash guard/splatter shield, to eliminate splatter of water droplets out of either air gap opening. Multiple air gap openings far exceed the code mandated minimum of (1) vertical.