Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank
$4.99
Price: $4.99
(as of Nov 03, 2025 10:36:49 UTC – Details)
Aquarium Air Pump Check Valves Red/Clear Clear Plastic One Way Non-Return Check Valve for Fish Tank
For Oxygen Pumps Only: Great 1-way check valve for most common aquarium air pumps. NOT suitable for CO2 or other high-pressure systems to avoid crack and leak.
Small & Light: Size: 2.1″ L x 0.55″ W; Diameter of air holes: 0.12″; Weight: 0.1 oz. Standard ID airline tubing: 3/16″. Add little weight to your hose for smooth airflow.
Ideal Pump Protectors: Prevent backflow of water through the tubing during a power outage or pump pause. Essential accessories for basic aeration setup in your fish tanks.
Sturdy & Quiet: Made of reliable plastic which can be tightly connected to the hose without air leak. The check valve can endure long-time use without making noise.
Easy Maintenance: Clean the valve regularly. Please poke it with a slim stick from the inlet side to push it open when it gets clogged inside and restricts air flow.
Customers say
Customers find the check valves work well at preventing water backflow and consider them good value for money. However, the quality receives mixed feedback, with some describing them as average while others find them poor. Moreover, air flow is a concern, with several customers reporting significant restrictions. Additionally, durability is a significant issue, with multiple customers reporting valves breaking at the point of connection and coming cracked in the package.
13 reviews for Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank
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C –
Best valves available.
Here is an honest review from a verified purchase. I have been keeping aquariums for 40 years. These are among the best valves Iâve had. They work perfectly. Any review that says otherwise was written by someone that doesnât know what they are doing or they were using them wrong. Simply slide a paper clip or toothpick into the opening and gently open the valve before connecting. After all you want a good seal to avoid water back flow. The air has air flows beautifully. They are easy to connect using some warm water on the tubing. They have nubs to keep the hose on. These are great valves. Donât pay attention to negative reviews.
TNSunshine –
Exactly what I needed
Thank gosh for these! No more water going back to the air pump when power goes out. Have been using one for a long while now with no issues. Super easy to install, no extra noise, exact fit, and does what it should. I own a 75 gallon fresh water tank.
B Smith –
Works effectively but the hoses slip off over time.
The airflow control works just fine but due to the smooth tapered connectors, the hoses constantly slide off. I had to superglue the hose onto it
G.T. –
Good check valves
Solid check valves. Value for money as well as quality. Would recommend.
J B –
Reliable Check Valve for CO2 Blow-Off and Suck-Back Prevention
This check valve has been a solid addition to my homebrewing setup! It works exactly as intendedâpreventing suck-back during cold crashes and stopping CO2 blow-off from backflowing. Easy to install and gives peace of mind during fermentation. A simple but essential piece of equipment for any serious homebrewer. Highly recommend!
Doris –
🙂
Product does not need review it does what it intend to do. Very durable.
Christopher Staton –
You get what you pay for…
These were pretty cheap so I really wasn’t expecting much and overall they are average. Yes, I saved money because just one at the local store is $5 buuuuuuut 2 out of the 6 were defective and made such a horrible whistling noise I thought my air pump was bad. The other 4 worked alright, they are a little tough to get the airline onto unless you’re using the super flexible silicone kind. But I’ve had another one snap off at the neck when I was trying to change the line so durability is definitely limited. These fit standard airline tubing!
Ginnis Gardens –
Great Product
Great little check valves, really love that they have barbed ends that actually hold the air line in place!
Aaron & Laura –
Good quality check valves. Only needed one but for the money got a load of spares! Functions as you would expect!
SBaack –
Work as expected, gotta have em in the fish room.
Steve –
so far these have been amazing
William –
Excellent one-way check valve.. although not recommended, I’ve used these on an CO² tubing and they actually work better than some CO² C.V’s I paid twice as much for.Would STRONGLY recommend for normal air pump lines on the aquarium.
Mar. P –
Good price for the quality received. A few whistle softly when air pushed through but was muted when other end was put in water. Overall very happy.