Bar Maid Fly-Bye Floor Drain Trap Seal for 3" Drain Pipes

Features a patented one-way valve that allows fluids to flow downward without restricting flow rate while preventing any backflow. Pesticide-free and VOC-free, it helps make drains virtually maintenance free and effectively stops fruit flies and other insects from entering through the drain. Acts as a vapor barrier to contain bacteria, odors, and gases, improving indoor air quality. Eliminates the need for primers or the addition of fresh water.