--- product_id: 218756470 title: "Quickun 5/16\" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs" brand: "quickun" price: "€ 12.76" currency: EUR in_stock: true reviews_count: 13 category: "Quickun" url: https://www.desertcart.pt/products/218756470-quickun-5-16-one-way-inline-check-valve-non-return store_origin: PT region: Portugal --- # Unidirectional flow control Tool-free, easy installation Corrosion-resistant PVDF plastic Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs **Brand:** quickun **Price:** € 12.76 **Availability:** ✅ In Stock ## Summary > 🔄 Keep your flow flawless—because reverse is never in style! ## Quick Answers - **What is this?** Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs by quickun - **How much does it cost?** € 12.76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/218756470-quickun-5-16-one-way-inline-check-valve-non-return) ## Best For - quickun enthusiasts ## Why This Product - Trusted quickun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Efficiency:** No tools needed—install quickly and maintain effortlessly for long-term reliability. - • **Versatile Power Player:** Perfect for industrial hydraulics, pneumatic tools, irrigation, and pool systems—your all-in-one flow guardian. - • **Compact Dual Pack Value:** Two 5/16" valves included, ready to upgrade multiple setups or keep as spares for peace of mind. - • **Built to Brave the Elements:** Crafted from high-grade PVDF plastic, this valve resists chemicals, acids, and ozone for unmatched durability. - • **Backflow Blocker Extraordinaire:** Spring-loaded design guarantees zero backflow, protecting your pumps and systems from costly damage. ## Overview The Quickun 5/16" One Way Inline Check Valve is a durable, spring-loaded, non-return valve made from corrosion-resistant PVDF plastic. Designed for easy, tool-free installation, it ensures unidirectional flow to protect pumps, compressors, and hydraulic systems from backflow damage. Ideal for industrial and commercial applications including fuel, water, gas, and air systems, this 2-pack offers reliable performance and long-term resistance to chemicals and ozone. ## Description Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs: desertcart.com: Industrial & Scientific Review: Always test for piece of mind - If you are confused on which direction is in and out don’t try blocking through with mouth! I used a 3/8 piece of rubber hose adapted to a water line to test because I couldn’t blow through with my mouth 👄, wide side in small side out 😊 Review: Prevent backflow in 3/8" tubing.... - Perfect for preventing backflow into the bucket of bleach from the backstream injector I use with my power washer. These are cheap but effective check valves for use with 3/8" tubing. ## Features - 【One-Way Flow Control】Spring-loaded valve design ensures unidirectional flow, preventing backflow and pressure surges. Safeguards pumps, compressors, and hydraulic systems from damage caused by reverse pressure. - 【Corrosion-Resistant Construction】High-grade plastic body, made from PVDF, offering durability against chemicals, acids, and moisture. - 【Size and Number】5/16", 2pcs - 【Easy Installation and Long-Term Reliability】Tool-free assembly, low maintenance. - 【Wide Applications】Industrial use for hydraulic systems, pneumatic tools and automation equipment. Commercial use for water pumps, irrigation systems, and pool filters. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B087PDGZ9F | | Best Sellers Rank | #11,795 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Check Valves | | Brand | Quickun | | Brand Name | Quickun | | Connector Type | Slip | | Customer Reviews | 4.1 out of 5 stars 1,029 Reviews | | Exterior Finish | Plastic,Rubber | | Inlet Connection Type | Barb | | Manufacturer | Quickun | | Manufacturer Part Number | 1-2120-valve-2new | | Material | Plastic, Rubber | | Material Type | Plastic, Rubber | | Model Number | 2 | | Number of Items | 2 | | Number of Packs | 2 | | Number of Pieces | 2 | | Number of Ports | 2 | | Outlet Connection Size | 7.94 millimeters | | Outlet Connection Type | Barb | | Set Name | 5/16" One-Way Check Valve Set (2 Pcs) | | Size | 5/16 Inch | | Specification Met | ASME B16.5 | | Thread Size | 5/16" | | Thread Type | barbed | | Unit Count | 2 Count | | Valve Type | Check Valve | ## Product Details - **Brand:** Quickun - **Exterior Finish:** Plastic,Rubber - **Inlet Connection Type:** Barb - **Manufacturer:** Quickun - **Material:** Plastic, Rubber - **Number of Ports:** 2 - **Outlet Connection Type:** Barb - **Specification Met:** ASME B16.5 ## Images ![Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs - Image 1](https://m.media-amazon.com/images/I/41ujscW4RnL.jpg) ![Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs - Image 2](https://m.media-amazon.com/images/I/51gLHgKNZZL.jpg) ![Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs - Image 3](https://m.media-amazon.com/images/I/51puMUVlXGL.jpg) ![Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs - Image 4](https://m.media-amazon.com/images/I/61Jx-XuJOUL.jpg) ![Quickun 5/16" One Way Inline Check Valve, Non Return Hose Barb, Ozone Resistance Plastic Valve for Fuel Oil Water Gas Pump Air, 2 Pcs - Image 5](https://m.media-amazon.com/images/I/51-hNKv1KGL.jpg) ## Available Options This product comes in different **Size, Number Of Items** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Always test for piece of mind *by R***N on May 4, 2026* If you are confused on which direction is in and out don’t try blocking through with mouth! I used a 3/8 piece of rubber hose adapted to a water line to test because I couldn’t blow through with my mouth 👄, wide side in small side out 😊 ### ⭐⭐⭐⭐⭐ Prevent backflow in 3/8" tubing.... *by N***1 on July 8, 2025* Perfect for preventing backflow into the bucket of bleach from the backstream injector I use with my power washer. These are cheap but effective check valves for use with 3/8" tubing. ### ⭐⭐⭐⭐ Dish soap or water, keeps the line primed. *by H***R on June 12, 2026* I have a kit to add a half gallon or gallon jug of dish soap under the sink. It kept draining back into the jug and it took 1000 pumps to get the soap back to the top. With one of these is stays at the top. Can also be use on he water line that runs to an ice maker. --- ## 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.pt/products/218756470-quickun-5-16-one-way-inline-check-valve-non-return](https://www.desertcart.pt/products/218756470-quickun-5-16-one-way-inline-check-valve-non-return) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-04*