Underwater Treasures Fish Aquarium Check Valve

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$1.42 Chewy Price
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About This Item

Details

  • Diagram included for easy installation.
  • Prevents back siphoning in the event of a power outage or air pump failure.
  • Helps protect your aquarium’s air pump (sold separately) from water damage.
  • Designed with accuracy and reliability in mind to help keep your tank safe and your fish healthy.
  • Made from durable materials for long-lasting use.

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Reviews
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4.5
Rated 4.5 out of 5 stars
59 Ratings
Terms & Conditions

13 Customer Reviews

Rated 1 out of 5 stars
By Martin on Dec 13, 2025

Not the best

It needs a bubbler that is strong to open the valve, dont want to create a huge amount of turbulence and stress the fish, so not using most of these

It needs a bubbler that is strong to open the valve, dont want to create a huge amount of turbulence and stress the fish, so not using most of these

Rated 1 out of 5 stars
By Scherry on Oct 15, 2025

stopped working

This check valve worked fine for two days then it stopped the air from going into my fish tank and no, it was not because the water backed up. It was just restricting

This check valve worked fine for two days then it stopped the air from going into my fish tank and no, it was not because the water backed up. It was just restricting the airflow.

Rated 2 out of 5 stars
By kaye on Jul 9, 2025

check valve

works but whistles very annoyingly,

works but whistles very annoyingly,

Rated 5 out of 5 stars
By kathy on Jun 29, 2025

Good product

These work well.

These work well.

Rated 5 out of 5 stars
By Ryan on Sep 10, 2024

Great price

Little tough getting tubing on but you don't want any leaks so it makes sense it would be tight. Overall great quality for the price. Also it comes apart makes the

Little tough getting tubing on but you don't want any leaks so it makes sense it would be tight. Overall great quality for the price. Also it comes apart makes the tube attachment easy on both ends

Rated 5 out of 5 stars
By Tom on Jan 8, 2025

Price

Priced right and shipped on time!!!!

Priced right and shipped on time!!!!

Rated 5 out of 5 stars
By Paul on Dec 3, 2024

Does it’s job

Prevents water from entering your aerator

Prevents water from entering your aerator

Rated 5 out of 5 stars
By Tony on Sep 11, 2024

Check valve

I use these for my aqurium with out any problems

I use these for my aqurium with out any problems

Rated 5 out of 5 stars
By Robert on Aug 6, 2024

Check calve

Good product priced right quality seems to perform well

Good product priced right quality seems to perform well

Rated 2 out of 5 stars
By Frank on Dec 7, 2023

I got two of these

The end unscrews, and I could never get it not to leak air. I think I am getting a 50% reduction of airflow one way and 95% the other way. I suppose I could get

The end unscrews, and I could never get it not to leak air. I think I am getting a 50% reduction of airflow one way and 95% the other way. I suppose I could get these to work correctly, but I would have to take it out and see if I could get it working as expected. For $2, it is not worth my time.