Prevents the spread of different dangerous bacterias that can cause potential health hazards. Eliminate the need to frequently pour primer and fresh water down the drain. The Green Drain's one-way valve eliminates the nasty odors from floor drains, while still keeping the drain fully functional at all times. Has a silicon skirt attached, preventing pests from getting in. Takes mere seconds to install and also acts as a barrier trap protection device. Eliminates the need for chemical applications, making it better on the environment. This product is covered by one or more U.S. and foreign patents, including U.S. Patent No. 7900288 and 9027172.