--- product_id: 156247093 title: "CV6C" brand: "pawfly" price: "€ 11.01" currency: EUR in_stock: true reviews_count: 13 category: "Pawfly" url: https://www.desertcart.at/products/156247093-cv6c store_origin: AT region: Austria --- # Smooth airflow, zero restriction Ultra-lightweight 0.1 oz, minimal hose load Prevents water backflow, pump protection CV6C **Brand:** pawfly **Price:** € 11.01 **Availability:** ✅ In Stock ## Summary > 🛡️ Protect your pump, breathe easy—never miss a bubble! ## Quick Answers - **What is this?** CV6C by pawfly - **How much does it cost?** € 11.01 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/156247093-cv6c) ## Best For - pawfly enthusiasts ## Why This Product - Trusted pawfly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy DIY Maintenance:** Simple to clean and unblock with a toothpick or paperclip, ensuring uninterrupted oxygen flow and long-lasting durability. - • **Compact & Featherlight:** At just 2.1" long and 0.1 oz, it adds virtually no weight or bulk—maintain sleek, efficient aquarium setups without compromise. - • **Ultimate Pump Protection:** One-way valve design stops damaging water backflow during power outages or pump pauses—keep your investment safe 24/7. - • **Effortless Airflow, Zero Noise:** Engineered with clear, sturdy plastic for whisper-quiet operation and no air leaks—your fish tank’s silent guardian. - • **Perfect Fit for Standard Tubing:** Seamlessly connects to 3/16" airline tubing, ensuring hassle-free installation and reliable performance every time. ## Overview The CV6C is a premium 1-way check valve designed exclusively for oxygen aquarium air pumps. Crafted from durable plastic, it prevents water backflow that can damage pumps during outages, fits standard 3/16" tubing, and ensures smooth, noiseless airflow. Lightweight and compact, it’s an essential, easy-to-maintain accessory for any serious aquarist aiming to safeguard their aeration system and keep aquatic life thriving. ## Description Product description White 1-Way Check Valves Pawfly specializes in all must-haves of aquarium accessories such as air pumps, air stones, sponge filters, fish nets, cleaning brushes and other accessories to set up your aquariums. Water backflow will always happen when the pump is turned off or the power source is interrupted. It’ll stop oxygen supplement and, worst of all, damage your air pump. The non-return check valves are necessities in the house of aquatic lovers. Made of plastic and designed to fit most common aquarium air pumps, the valves can effectively prevent water from back siphoning and ensure smooth airflow. Essential for the most meticulous aeration setup in your fish tanks. For oxygen systems only Fit standard 3/16" tubing No restriction of airflow Sturdy and aging-resistant No air leak or noise Packed with 6 Pcs in total How to Install 1. Before use, clean and dry the 2 ends of the tubing which is connected to the valve to ensure tight connection. 2. Check the right direction of the valve to make sure that it is consistent with the direction of air flow. 3. Insert the check valve into the tubing carefully and link them completely. Tips: If the valve restricts air flow in both directions, please stick something into the hole on the inlet side of the valve to poke it open. And then the valve will allow for an unobstructed passageway for airflow. Great Pump Protectors Effectively prevent water backflow caused by a sudden power outage. Ideally safeguard your air pump and reduce your losses when you’re at work or on vacation. Fit 3/16" Airline Tubing Perfectly match standard 3/16"hoses. Optimal for oxygen systems in your aquariums or fish tanks. DO NOT place them in CO2 or other high-pressure systems. Dependable Construction Use hard clear plastic which allows for smooth airflow with no restriction, air leak or noise. Reliable material to keep your fish healthy and endure long-time use. Review: Great quality check valves - Great quality check valves for a really reasonable price. Not much to these. Worked great for fixing my Keurig 2.0 K200 coffee maker which had a damaged air pump (very common problem I learned). Replaced the air pump and tested operation. Worked great but noticed water was being pushed into it, which is what caused it to fail the first time. Added one of these check valves in line and life is great now. Shame on Keurig for planned obsolescence. Review: 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 I’ve had. They work perfectly. Any review that says otherwise was written by someone that doesn’t 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. Don’t pay attention to negative reviews. ## Features - 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 valves 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07VWQXRZT | | Best Sellers Rank | #7,976 in Pet Supplies ( See Top 100 in Pet Supplies ) #5 in Aquarium Air Pump Accessories | | Brand | Pawfly | | Brand Name | Pawfly | | Connector Type | Barb | | Customer Reviews | 4.5 out of 5 stars 5,477 Reviews | | Exterior Finish | Plastic | | Inlet Connection Type | Barb | | Item Weight | 0.1 Ounces | | Manufacturer | Pawfly | | Material | Plastic | | Material Type | Plastic | | Maximum Operating Pressure | 1 Atmosphere | | Maximum Pressure | 1 Atmosphere | | Model Number | 652811966169 | | Number of Ports | 12 | | Set Name | 6 Pack | | Size | 2.1" L x 0.55" W | | UPC | 652811966169 | | Unit Count | 6.0 Count | | Valve Type | Check Valve | ## Product Details - **Brand:** Pawfly - **Exterior Finish:** Plastic - **Inlet Connection Type:** Barb - **Manufacturer:** Pawfly - **Material:** Plastic - **Maximum Operating Pressure:** 1 Atmosphere - **Number of Ports:** 12 - **UPC:** 652811966169 ## Images ![CV6C - Image 1](https://m.media-amazon.com/images/I/61S7t84MobL.jpg) ![CV6C - Image 2](https://m.media-amazon.com/images/I/61RQnSAdzrL.jpg) ![CV6C - Image 3](https://m.media-amazon.com/images/I/71TfbGnj62L.jpg) ![CV6C - Image 4](https://m.media-amazon.com/images/I/61gxvlWRVZL.jpg) ![CV6C - Image 5](https://m.media-amazon.com/images/I/6125SjJ8s5L.jpg) ## Available Options This product comes in different **Pattern, Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great quality check valves *by B***V on January 2, 2026* Great quality check valves for a really reasonable price. Not much to these. Worked great for fixing my Keurig 2.0 K200 coffee maker which had a damaged air pump (very common problem I learned). Replaced the air pump and tested operation. Worked great but noticed water was being pushed into it, which is what caused it to fail the first time. Added one of these check valves in line and life is great now. Shame on Keurig for planned obsolescence. ### ⭐⭐⭐⭐⭐ Best valves available. *by C***C on May 29, 2025* Here is an honest review from a verified purchase. I have been keeping aquariums for 40 years. These are among the best valves I’ve had. They work perfectly. Any review that says otherwise was written by someone that doesn’t 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. Don’t pay attention to negative reviews. ### ⭐⭐⭐⭐ Works effectively but the hoses slip off over time. *by B***H on July 13, 2025* 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/156247093-cv6c](https://www.desertcart.at/products/156247093-cv6c) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-07-08*