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Floor Drain Backflow Preventer, Silicone One Way Drain Valve for Sink Pipe in Bathroom Kitchen Laundry Basement (Blue)

4.4 (10) Write Review
Free shipping on orders over $29.99

$14.05

$ 5 .75 $5.75

In Stock

About this item

  • It is suitable for standard 1 1/2”to 2" pipe.
  • It avoids odor get out of the pipe while also allowing the water to easily drain.
  • Installation is very simple, with no alteration to existing outlets.
  • Just order several to install in every floor drain, like basement, laundry, bathroom shower, kitchen sink etc.
  • If the silicone part is too long, you can trim the flat bottom to achieve quick drainage.


Product Description

drain backflow preventer
drain backflow preventer
drain backflow preventer
drain backflow preventer
drain backflow preventer

Klee Rogers
August 7, 2025
Package states fit for a 2" drain, fell right in the pipe, not accurate fit at all, very disappointed with this product, false advertising
Sean Riddolls
July 26, 2025
While these do fit into a standard kitchen sink drain (if you discard the outer adaptor), they absolutely require a straight unobstructed drop of 4.5 inches minimum [11.5cm] to function correctly – Which is rare in kitchen drains.If your drain has any bends or angles within the first 4.5 inches, then the lower rubber flanges of the backflow preventer will sit folded closed against the inside of the pipe, and actually *cause* a blockage, preventing water from draining.I have attempted to illustrate the resulting internal fold in the photos, by overlaying the backflow preventer in front of the pipe in the same folded position.I would be less annoyed if Amazon had permitted me to return these products, but for whatever reason, there are no returns permitted on this product. : (
TorontoLady
July 20, 2025
It inserted into the drain easily enough but it just made the water back up into the shower pan. There’s better solutions.
Philip Leak
July 9, 2025
sewer gasses still seeping up my drains
DM
June 30, 2025
We're on septic and this keeps the smells from coming in the house
Enrike N.
May 3, 2025
Se instala muy rápido
Jakeytoo
March 16, 2025
The media could not be loaded.
KaPe
February 26, 2025
War die einzige wirklich gute Lösung für einen Duschwannenabfluss, bei dem es gelegentlich Rückstau durch gleichzeites Leeren der badewanne gab.
helil
January 30, 2025
للفتحات الصغيرة
Hb
January 16, 2025
Easy to install, been using for awhile and works gr8!
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