Fermus Shower Floor Drain Insert Drain Plug Anti-Odor Plug Sewer Core One Way Drain Valve Backflow Preventer for Basement Drain, Suitable for Drain Tube 1.25-1.65in, Minimum Drain Depth 2in (Gold)

The item fits snug in the shower drain hole.The water flows down the drain with no problem.The best part and reason why we got the device, the bad odors from the drain pipe do not come through.Perfect solution to a big odor problem.

Pésima calidad una vez ya instalada no deja correr el agua cuando trate de sacarlo se rompió lo cual creo será inaceptable la devolución

Excelente

This item does serve as a one way valve. The water however flows through slowly leaving a backed up in the shower.

No more stinky fumes and sewer bugs. Cheaper on temu but this came in a day.

Flap did not open properly leaving pool of water at the bottom of the sink slow drain instead of a open flush. But it looks good🫣

Quedó perfecto lo recomiendo , así no se tapará nunca y evitará que entren cucarachas a tu ducha

Purchased product. Came exactly as described. And it fit well into my bathtub drain. It is a little lose but does the job. So far, it’s kept about 90% of the odor away. Before the odor used to inhibit the entire bathroom but now it’s only when you get close to the shower drain. So it is working.The only thing I might add to the manufacturer is to include some instructions as it may not be clear to some customers on how to use it.