--- product_id: 577561543 title: "CV6R" brand: "pawfly" price: "€ 8.74" currency: EUR in_stock: true reviews_count: 13 category: "Pawfly" url: https://www.desertcart.it/products/577561543-cv6r store_origin: IT region: Italy --- # Smooth airflow, no restriction One-way check valve prevents backflow Durable plastic, long-lasting protection CV6R **Brand:** pawfly **Price:** € 8.74 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Protect your pump, perfect your tank – the CV6R check valve keeps your aquatic world flowing flawlessly! ## Quick Answers - **What is this?** CV6R by pawfly - **How much does it cost?** € 8.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/577561543-cv6r) ## 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 - β€’ **Hassle-Free Maintenance:** Easily unclog with a simple poke to maintain optimal airflow, keeping your system running smoothly with minimal effort. - β€’ **Universal Compatibility:** Fits standard 4-6 mm airline tubing, making it the go-to accessory for most oxygen aquarium pumps. - β€’ **Ultimate Pump Protection:** Prevents damaging water backflow during power outages, safeguarding your investment when you’re away. - β€’ **Compact & Lightweight Design:** At just 3g and 5.4 x 1.4 cm, it integrates seamlessly without adding bulk or weight to your tubing setup. - β€’ **Effortless Airflow Assurance:** Engineered for zero air leaks and silent operation, ensuring your aquatic environment stays perfectly aerated. ## Overview The CV6R is a set of six sturdy, silent one-way check valves designed exclusively for oxygen aquarium pumps. Crafted from durable plastic, these valves prevent water backflow during power interruptions, protecting your air pump and maintaining consistent airflow. Compact and lightweight, they fit standard 4-6 mm airline tubing and are easy to maintain, making them an essential upgrade for any professional or hobbyist aquarist aiming for a flawless aeration setup. ## Description Product Description 1 Way Red Check Valves 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 Sturdy 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 No restriction of airflow Fit standard 4-6 mm tubing No air leak or noise Sturdy and aging-resistant 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. Fit 4-6 mm Airline Tubing Perfectly match standard 4-6 mm hoses. Optimal for oxygen systems in your aquariums or fish tanks. DO NOT place them in CO2 or other high-pressure systems. 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. 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: Good value for money! - Good quality check valves. Only needed one but for the money got a load of spares! Functions as you would expect! Review: Great value! - The quality is good especially when you consider the price point. Recommended A*** ## Features - For Oxygen Pumps Only: Great one-way check valve for most common aquarium air pumps. NOT suitable for CO2 or other high-pressure systems to avoid crack and leak. - 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. - Small & Light: Size: 5.4L x 1.4W(cm); Diameter of air holes: 0.3cm; Weight: 3g. Standard ID airline tubing: 0.5cm. Add little weight to your hose for smooth airflow. - 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. - Sturdy & Quiet: Made of reliable plastic which can be tightly connected to the hose without air leak. Sturdy to endure long-time use without making noise. ## Technical Specifications | Specification | Value | |---------------|-------| | Package Dimensions | 12.5 x 7.6 x 1.6 cm; 3 g | | Colour | Red | | Size | Red | | Number of Items | 6 | | Quantity | 1 | | Batteries required | No | | Item Weight | 3 g | ## Images ![CV6R - Image 1](https://m.media-amazon.com/images/I/61jZd-FVRXL.jpg) ![CV6R - Image 2](https://m.media-amazon.com/images/I/61HD4KZ7agL.jpg) ![CV6R - Image 3](https://m.media-amazon.com/images/I/61clqZMdOaL.jpg) ![CV6R - Image 4](https://m.media-amazon.com/images/I/71xyXJ1vmnL.jpg) ![CV6R - Image 5](https://m.media-amazon.com/images/I/61elLn3FfIL.jpg) ## Available Options This product comes in different **Pattern, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good value for money! *by A***A on 27 July 2025* Good quality check valves. Only needed one but for the money got a load of spares! Functions as you would expect! ### ⭐⭐⭐⭐⭐ Great value! *by J***. on 2 January 2026* The quality is good especially when you consider the price point. Recommended A*** ### ⭐⭐⭐⭐ One out of six supplied leaked and admitted air. *by M***Y on 26 April 2026* Work well for water as well as air. The halves of the body screw together, and one of the six supplied admitted air through the join. A bit of solvent glue on the threads fixed that. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/577561543-cv6r](https://www.desertcart.it/products/577561543-cv6r) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-07-21*