Floor Drain Backflow Preventer

Green Drain floor drain backflow preventer will help prevent a drain backup, stop odors and sewer gas and prevent insects and other pests from coming up from the floor drain. It comes in 2, 3, 3 1/2 and 4 inch sizes. Check out more information at www.greendrains...
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[@hwodolw0rkthisthin798]

This device may prevent sewer gas from coming up but there is no way that it would stop a wastewater backflow event. Those silicone flaps would blow out instantaneously from any pressure whatsoever, allowing sewage to easily backflow up and out of the drain. Backflow events can exert tremendous pressure.

[@solangina.Official]

It doesn’t, one day with it and already have overflow and not way to takeoff

[@pardontv876]

What is the solution? I really need an answer.

[@pardontv876]

@@solangina.Officialdid you find a solution

[@JaaceB]

the inner diameter of the pipe I'm trying to fit this into is 2.5 inches. How do I install? which do I choose?

[@FIXITHomeImprovementChannel]

Hi, I would contact the company. I only saw 2 or 3 inch sizes.