Magic Trap™ fitting is a 1 1/2 inch tubular polypropylene fitting. The Magic Trap fitting replaces any standard 1 1/2 inch tubular trap. The Micro size Magic Vent® AAV screws directly onto the tee connection of the Magic Trap™ fitting. It automatically places the Magic Vent at the required 4 inch height above the drain pipe to which it is connected. The installation time for the vent system is approximately 25 seconds.