Made from a flexible, antimicrobial polymer, Grate Seal is a permanent & maintenance free, one-way valve that is easily retro-fitted into drains & floor wastes to stop sewer smells and hazardous odors, disease carrying airborne mold and bacteria, vermin and cockroaches, sewer back-wash, suds and even noise coming from drains into habitable areas. From Homes to Hospitals to High-rises, Grate Seal is 100% effective.
K**R
:( :( :( Bottom Seal is Horrible - Sent these back to Amazon :( :( :(
Sent these units back as the seals on the bottom of the units were very poor. The seal was either damaged from shipping or storage or just made that way when they manufactured them. Since these are designed to keep out sewer gases and water back-up from a drain when installed in your house, it is imperative these seal tightly and properly; from the picture you can see that isn't the case. If you order these, I hope you get better stock than I did.
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