Often times the odors in restrooms are sewer gases that come up from the floor drains. Flushing the drains with water on a frequent basis and adding an enzymatic product in the drain will lessen the smell/odor. To eliminate the odor, Green Drains provide a superior solution. The one-way valve is placed into the drain, thereby eliminating odors, providing a chemical-free solution that will last for years and is easy to install. Made from silicon, the valve skirts can also prevent flood damage.