Pretty great no problem setting it up ! Connected everything without any issues and it works great

Petco has excellent customer service. During this visit to pic up an item I decided to make another purchase. The assistant quickly located the item and I was on my way. The item worked as expected. Simple and effective

I bought this check valve and tried it out, it did not work, the air would not go through it.

The first check valve I tried as a new fish owner was purchased at a competitor's store. It broke in half in a matter of minutes. So I picked one up at Petco and it looked like it was already better quality. It stayed in the package until I was ready again to experiment with an old, unused air pump. Long story short, it GREATLY reduced air flow. So I read all the reviews here of people who also had issues with them. I FIXED the problem in a VERY simple way: take a toothpick and slide it through the center of the rubber valve in the direction of airflow. It took ONE TRY and now air is gushing through the valve and into my test filter! PLENTY of bubbles now! And it hasn't broken in half yet, either ;-)

Great check valve for the money. They are working great on my aquariums. I'm using one pump for 2 aquariums.

Bought this check valve to replace a more complicated & older valve that no longer worked. Installed fine, but the instructions didn't explain which direction to mount in-line, so that took some experimentation, but one I figured it out, it worked fine. It did leak a little on the one end, but after a day or so, it stopped leaking. Very inexpensive.

Works as advertised and easy to install. Clear case so you can see the valve.

It did reduce the bubble output a little bit but it assembled fine and seems like it does the job. I'd rather deal with less bubbles than disaster if we lose power.